18774117012 has 24 divisors (see below), whose sum is σ = 50064312256. Its totient is φ = 5364033408.

The previous prime is 18774117001. The next prime is 18774117041. The reversal of 18774117012 is 21071147781.

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, 111750613 + ... + 111750780.

Almost surely, 2^18774117012 is an apocalyptic number.

18774117012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18774117012 is an abundant number, since it is smaller than the sum of its proper divisors (31290195244).

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

18774117012 is a wasteful number, since it uses less digits than its factorization.

18774117012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223501407 (or 223501405 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 39.

The spelling of 18774117012 in words is "eighteen billion, seven hundred seventy-four million, one hundred seventeen thousand, twelve".