18957120345 has 48 divisors (see below), whose sum is σ = 34471008000. Its totient is φ = 9624289920.

The previous prime is 18957120319. The next prime is 18957120409. The reversal of 18957120345 is 54302175981.

18957120345 is a `hidden beast` number, since 18 + 9 + 571 + 20 + 3 + 45 = 666.

It is not a de Polignac number, because 18957120345 - 2²¹ = 18955023193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18957120345.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9645 + ... + 194954.

It is an arithmetic number, because the mean of its divisors is an integer number (718146000).

Almost surely, 2^18957120345 is an apocalyptic number.

18957120345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18957120345 is a deficient number, since it is larger than the sum of its proper divisors (15513887655).

18957120345 is a wasteful number, since it uses less digits than its factorization.

18957120345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204710 (or 204707 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 18957120345 in words is "eighteen billion, nine hundred fifty-seven million, one hundred twenty thousand, three hundred forty-five".