18997850575 has 24 divisors (see below), whose sum is σ = 25738035696. Its totient is φ = 13795584000.

The previous prime is 18997850539. The next prime is 18997850593. The reversal of 18997850575 is 57505879981.

It is a happy number.

It is not a de Polignac number, because 18997850575 - 2⁷ = 18997850447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129519 + ... + 234031.

It is an arithmetic number, because the mean of its divisors is an integer number (1072418154).

Almost surely, 2^18997850575 is an apocalyptic number.

18997850575 is a deficient number, since it is larger than the sum of its proper divisors (6740185121).

18997850575 is a wasteful number, since it uses less digits than its factorization.

18997850575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105195 (or 105190 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 64.

The spelling of 18997850575 in words is "eighteen billion, nine hundred ninety-seven million, eight hundred fifty thousand, five hundred seventy-five".