18613333220940 has 144 divisors (see below), whose sum is σ = 56524448967168. Its totient is φ = 4957930778112.

The previous prime is 18613333220903. The next prime is 18613333220953. The reversal of 18613333220940 is 4902233331681.

18613333220940 is a `hidden beast` number, since 1 + 8 + 6 + 1 + 3 + 333 + 220 + 94 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1434768294 + ... + 1434781266.

Almost surely, 2^{18613333220940} is an apocalyptic number.

18613333220940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18613333220940 is an abundant number, since it is smaller than the sum of its proper divisors (37911115746228).

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

18613333220940 is a wasteful number, since it uses less digits than its factorization.

18613333220940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21408 (or 21403 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 18613333220940 in words is "eighteen trillion, six hundred thirteen billion, three hundred thirty-three million, two hundred twenty thousand, nine hundred forty".