18212029928 has 48 divisors (see below), whose sum is σ = 35717149260. Its totient is φ = 8704640000.

The previous prime is 18212029889. The next prime is 18212029931. The reversal of 18212029928 is 82992021281.

It can be written as a sum of positive squares in 6 ways, for example, as 13105212484 + 5106817444 = 114478^2 + 71462^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 666128 + ... + 692928.

Almost surely, 2^18212029928 is an apocalyptic number.

It is an amenable number.

18212029928 is a deficient number, since it is larger than the sum of its proper divisors (17505119332).

18212029928 is a wasteful number, since it uses less digits than its factorization.

18212029928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26966 (or 26933 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 18212029928 in words is "eighteen billion, two hundred twelve million, twenty-nine thousand, nine hundred twenty-eight".