20720217501552 has 20 divisors (see below), whose sum is σ = 53527228545800. Its totient is φ = 6906739167168.

The previous prime is 20720217501551. The next prime is 20720217501601. The reversal of 20720217501552 is 25510571202702.

It is a self number, because there is not a number n which added to its sum of digits gives 20720217501552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20720217501551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215835598927 + ... + 215835599022.

It is an arithmetic number, because the mean of its divisors is an integer number (2676361427290).

Almost surely, 2^{20720217501552} is an apocalyptic number.

It is an amenable number.

20720217501552 is an abundant number, since it is smaller than the sum of its proper divisors (32807011044248).

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

20720217501552 is a wasteful number, since it uses less digits than its factorization.

20720217501552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431671197960 (or 431671197954 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 39.

The spelling of 20720217501552 in words is "twenty trillion, seven hundred twenty billion, two hundred seventeen million, five hundred one thousand, five hundred fifty-two".