18773110773972 has 288 divisors, whose sum is σ = 53791601808000. Its totient is φ = 5645759201280.

The previous prime is 18773110773943. The next prime is 18773110773983. The reversal of 18773110773972 is 27937701137781.

18773110773972 is a `hidden beast` number, since 187 + 7 + 311 + 0 + 7 + 73 + 9 + 72 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 248543572 + ... + 248619092.

Almost surely, 2^{18773110773972} is an apocalyptic number.

18773110773972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18773110773972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26895800904000).

18773110773972 is an abundant number, since it is smaller than the sum of its proper divisors (35018491034028).

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

18773110773972 is a wasteful number, since it uses less digits than its factorization.

18773110773972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75828 (or 75797 counting only the distinct ones).

The product of its (nonzero) digits is 21781872, while the sum is 63.

The spelling of 18773110773972 in words is "eighteen trillion, seven hundred seventy-three billion, one hundred ten million, seven hundred seventy-three thousand, nine hundred seventy-two".