18152970381 has 24 divisors (see below), whose sum is σ = 32271948800. Its totient is φ = 9575192736.

The previous prime is 18152970337. The next prime is 18152970427. The reversal of 18152970381 is 18307925181.

18152970381 is a `hidden beast` number, since 181 + 5 + 2 + 97 + 0 + 381 = 666.

It is not a de Polignac number, because 18152970381 - 2²¹ = 18150873229 is a prime.

It is a super-2 number, since 2×18152970381² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18152970301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11081581 + ... + 11083218.

Almost surely, 2^18152970381 is an apocalyptic number.

It is an amenable number.

18152970381 is a deficient number, since it is larger than the sum of its proper divisors (14118978419).

18152970381 is a wasteful number, since it uses less digits than its factorization.

18152970381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22164825 (or 22164822 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 18152970381 in words is "eighteen billion, one hundred fifty-two million, nine hundred seventy thousand, three hundred eighty-one".