18611703372 has 12 divisors (see below), whose sum is σ = 43427307896. Its totient is φ = 6203901120.

The previous prime is 18611703367. The next prime is 18611703401. The reversal of 18611703372 is 27330711681.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18611703372.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775487629 + ... + 775487652.

Almost surely, 2^18611703372 is an apocalyptic number.

18611703372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18611703372 is an abundant number, since it is smaller than the sum of its proper divisors (24815604524).

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

18611703372 is a wasteful number, since it uses less digits than its factorization.

18611703372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550975288 (or 1550975286 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 18611703372 in words is "eighteen billion, six hundred eleven million, seven hundred three thousand, three hundred seventy-two".