20767574780 has 24 divisors (see below), whose sum is σ = 43614692352. Its totient is φ = 8306499392.

The previous prime is 20767574761. The next prime is 20767574791. The reversal of 20767574780 is 8747576702.

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, 486374 + ... + 527346.

It is an arithmetic number, because the mean of its divisors is an integer number (1817278848).

Almost surely, 2^20767574780 is an apocalyptic number.

20767574780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20767574780 is an abundant number, since it is smaller than the sum of its proper divisors (22847117572).

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

20767574780 is a wasteful number, since it uses less digits than its factorization.

20767574780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66325 (or 66323 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 53.

The spelling of 20767574780 in words is "twenty billion, seven hundred sixty-seven million, five hundred seventy-four thousand, seven hundred eighty".