19421825 has 12 divisors (see below), whose sum is σ = 24334380. Its totient is φ = 15375360.

The previous prime is 19421813. The next prime is 19421833. The reversal of 19421825 is 52812491.

It can be written as a sum of positive squares in 6 ways, for example, as 167281 + 19254544 = 409^2 + 4388^2 .

It is not a de Polignac number, because 19421825 - 2⁸ = 19421569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19421791 and 19421800.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1580 + ... + 6429.

It is an arithmetic number, because the mean of its divisors is an integer number (2027865).

Almost surely, 2^19421825 is an apocalyptic number.

It is an amenable number.

19421825 is a deficient number, since it is larger than the sum of its proper divisors (4912555).

19421825 is an equidigital number, since it uses as much as digits as its factorization.

19421825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8116 (or 8111 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 19421825 is about 4407.0199681871. The cubic root of 19421825 is about 268.8004628514.

The spelling of 19421825 in words is "nineteen million, four hundred twenty-one thousand, eight hundred twenty-five".