19422603225 has 135 divisors (see below), whose sum is σ = 38204959023. Its totient is φ = 9753320160.

The previous prime is 19422603131. The next prime is 19422603269. The reversal of 19422603225 is 52230622491.

The square root of 19422603225 is 139365.

It is a perfect power (a square), and thus also a powerful number.

19422603225 is a `hidden beast` number, since 1 + 9 + 4 + 22 + 603 + 2 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6992137161 + 12430466064 = 83619^2 + 111492^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 19422603225 - 2⁷ = 19422603097 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19422603225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 119156994 + ... + 119157156.

Almost surely, 2^19422603225 is an apocalyptic number.

19422603225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19422603225 is the 139365-th square number.

19422603225 is the 69683-rd centered octagonal number.

It is an amenable number.

19422603225 is a deficient number, since it is larger than the sum of its proper divisors (18782355798).

19422603225 is an equidigital number, since it uses as much as digits as its factorization.

19422603225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Multiplying 19422603225 by its sum of digits (36), we get a square (699213716100 = 836190²).

The spelling of 19422603225 in words is "nineteen billion, four hundred twenty-two million, six hundred three thousand, two hundred twenty-five".