18896428084 has 24 divisors (see below), whose sum is σ = 33502839048. Its totient is φ = 9324986880.

The previous prime is 18896428069. The next prime is 18896428097. The reversal of 18896428084 is 48082469881.

It can be written as a sum of positive squares in 4 ways, for example, as 13184091684 + 5712336400 = 114822^2 + 75580^2 .

It is a super-2 number, since 2×18896428084² (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, 4857 + ... + 194464.

It is an arithmetic number, because the mean of its divisors is an integer number (1395951627).

Almost surely, 2^18896428084 is an apocalyptic number.

It is an amenable number.

18896428084 is a deficient number, since it is larger than the sum of its proper divisors (14606410964).

18896428084 is a wasteful number, since it uses less digits than its factorization.

18896428084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199635 (or 199633 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 58.

The spelling of 18896428084 in words is "eighteen billion, eight hundred ninety-six million, four hundred twenty-eight thousand, eighty-four".