18777964950720 has 112 divisors (see below), whose sum is σ = 66244487495520. Its totient is φ = 5007457317888.

The previous prime is 18777964950713. The next prime is 18777964950751. The reversal of 18777964950720 is 2705946977781.

18777964950720 is a `hidden beast` number, since 1 + 8 + 7 + 7 + 7 + 96 + 4 + 9 + 507 + 20 = 666.

It is a super-2 number, since 2×18777964950720² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1086679147 + ... + 1086696426.

Almost surely, 2^{18777964950720} is an apocalyptic number.

18777964950720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18777964950720 is an abundant number, since it is smaller than the sum of its proper divisors (47466522544800).

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

18777964950720 is a wasteful number, since it uses less digits than its factorization.

18777964950720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173375599 (or 2173375583 counting only the distinct ones).

The product of its (nonzero) digits is 373403520, while the sum is 72.

The spelling of 18777964950720 in words is "eighteen trillion, seven hundred seventy-seven billion, nine hundred sixty-four million, nine hundred fifty thousand, seven hundred twenty".