18157196452 has 24 divisors (see below), whose sum is σ = 33174489600. Its totient is φ = 8679196416.

The previous prime is 18157196437. The next prime is 18157196479. The reversal of 18157196452 is 25469175181.

It is a junction number, because it is equal to n+sod(n) for n = 18157196396 and 18157196405.

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 7 ways as a sum of consecutive naturals, for example, 121549 + ... + 226027.

It is an arithmetic number, because the mean of its divisors is an integer number (1382270400).

Almost surely, 2^18157196452 is an apocalyptic number.

It is an amenable number.

18157196452 is a deficient number, since it is larger than the sum of its proper divisors (15017293148).

18157196452 is a wasteful number, since it uses less digits than its factorization.

18157196452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106395 (or 106393 counting only the distinct ones).

The product of its digits is 604800, while the sum is 49.

The spelling of 18157196452 in words is "eighteen billion, one hundred fifty-seven million, one hundred ninety-six thousand, four hundred fifty-two".