19157145902 has 16 divisors (see below), whose sum is σ = 29742174000. Its totient is φ = 9243433920.

The previous prime is 19157145893. The next prime is 19157145913. The reversal of 19157145902 is 20954175191.

It is a super-2 number, since 2×19157145902² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26474 + ... + 197522.

It is an arithmetic number, because the mean of its divisors is an integer number (1858885875).

Almost surely, 2^19157145902 is an apocalyptic number.

19157145902 is a deficient number, since it is larger than the sum of its proper divisors (10585028098).

19157145902 is a wasteful number, since it uses less digits than its factorization.

19157145902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173011.

The product of its (nonzero) digits is 113400, while the sum is 44.

The spelling of 19157145902 in words is "nineteen billion, one hundred fifty-seven million, one hundred forty-five thousand, nine hundred two".