20747570251812 has 48 divisors (see below), whose sum is σ = 48435850919232. Its totient is φ = 6912306977920.

The previous prime is 20747570251789. The next prime is 20747570251853. The reversal of 20747570251812 is 21815207574702.

It is a happy number.

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, 248500618 + ... + 248584094.

It is an arithmetic number, because the mean of its divisors is an integer number (1009080227484).

Almost surely, 2^{20747570251812} is an apocalyptic number.

It is an amenable number.

20747570251812 is an abundant number, since it is smaller than the sum of its proper divisors (27688280667420).

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

20747570251812 is a wasteful number, since it uses less digits than its factorization.

20747570251812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93868 (or 93866 counting only the distinct ones).

The product of its (nonzero) digits is 2195200, while the sum is 51.

The spelling of 20747570251812 in words is "twenty trillion, seven hundred forty-seven billion, five hundred seventy million, two hundred fifty-one thousand, eight hundred twelve".