18128957852 has 24 divisors (see below), whose sum is σ = 32766125952. Its totient is φ = 8767512000.

The previous prime is 18128957849. The next prime is 18128957911. The reversal of 18128957852 is 25875982181.

It is a super-2 number, since 2×18128957852² (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, 207602 + ... + 281702.

It is an arithmetic number, because the mean of its divisors is an integer number (1365255248).

Almost surely, 2^18128957852 is an apocalyptic number.

It is an amenable number.

18128957852 is a deficient number, since it is larger than the sum of its proper divisors (14637168100).

18128957852 is a wasteful number, since it uses less digits than its factorization.

18128957852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76109 (or 76107 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 56.

The spelling of 18128957852 in words is "eighteen billion, one hundred twenty-eight million, nine hundred fifty-seven thousand, eight hundred fifty-two".