19425427156 has 12 divisors (see below), whose sum is σ = 34140398292. Its totient is φ = 9671027648.

The previous prime is 19425427139. The next prime is 19425427181. The reversal of 19425427156 is 65172452491.

It can be written as a sum of positive squares in 2 ways, for example, as 8037122500 + 11388304656 = 89650^2 + 106716^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10420435 + ... + 10422298.

It is an arithmetic number, because the mean of its divisors is an integer number (2845033191).

Almost surely, 2^19425427156 is an apocalyptic number.

It is an amenable number.

19425427156 is a deficient number, since it is larger than the sum of its proper divisors (14714971136).

19425427156 is a wasteful number, since it uses less digits than its factorization.

19425427156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20842970 (or 20842968 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The spelling of 19425427156 in words is "nineteen billion, four hundred twenty-five million, four hundred twenty-seven thousand, one hundred fifty-six".