19420221026 has 8 divisors (see below), whose sum is σ = 30134825820. Its totient is φ = 9375279088.

The previous prime is 19420220983. The next prime is 19420221047. The reversal of 19420221026 is 62012202491.

It can be written as a sum of positive squares in 2 ways, for example, as 19059183025 + 361038001 = 138055^2 + 19001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 19420221026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167415641 + ... + 167415756.

Almost surely, 2^19420221026 is an apocalyptic number.

19420221026 is a deficient number, since it is larger than the sum of its proper divisors (10714604794).

19420221026 is a wasteful number, since it uses less digits than its factorization.

19420221026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334831428.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 19420221026 in words is "nineteen billion, four hundred twenty million, two hundred twenty-one thousand, twenty-six".