18912411228 has 24 divisors (see below), whose sum is σ = 44148488832. Its totient is φ = 6301347184.

The previous prime is 18912411187. The next prime is 18912411233. The reversal of 18912411228 is 82211421981.

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, 320400 + ... + 374807.

It is an arithmetic number, because the mean of its divisors is an integer number (1839520368).

Almost surely, 2^18912411228 is an apocalyptic number.

It is an amenable number.

18912411228 is an abundant number, since it is smaller than the sum of its proper divisors (25236077604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18912411228 is a wasteful number, since it uses less digits than its factorization.

18912411228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697481 (or 697479 counting only the distinct ones).

The product of its digits is 18432, while the sum is 39.

The spelling of 18912411228 in words is "eighteen billion, nine hundred twelve million, four hundred eleven thousand, two hundred twenty-eight".