20515702721352 has 64 divisors (see below), whose sum is σ = 52136529447360. Its totient is φ = 6725625696000.

The previous prime is 20515702721329. The next prime is 20515702721377. The reversal of 20515702721352 is 25312720751502.

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, 10994943 + ... + 12724785.

It is an arithmetic number, because the mean of its divisors is an integer number (814633272615).

Almost surely, 2^{20515702721352} is an apocalyptic number.

It is an amenable number.

20515702721352 is an abundant number, since it is smaller than the sum of its proper divisors (31620826726008).

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

20515702721352 is a wasteful number, since it uses less digits than its factorization.

20515702721352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738014 (or 1738010 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 42.

The spelling of 20515702721352 in words is "twenty trillion, five hundred fifteen billion, seven hundred two million, seven hundred twenty-one thousand, three hundred fifty-two".