20150653621 has 12 divisors (see below), whose sum is σ = 23445495360. Its totient is φ = 17268349560.

The previous prime is 20150653613. The next prime is 20150653651. The reversal of 20150653621 is 12635605102.

It is not a de Polignac number, because 20150653621 - 2³ = 20150653613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20150653651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206106 + ... + 287716.

It is an arithmetic number, because the mean of its divisors is an integer number (1953791280).

Almost surely, 2^20150653621 is an apocalyptic number.

It is an amenable number.

20150653621 is a deficient number, since it is larger than the sum of its proper divisors (3294841739).

20150653621 is an equidigital number, since it uses as much as digits as its factorization.

20150653621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86664 (or 86657 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 20150653621 in words is "twenty billion, one hundred fifty million, six hundred fifty-three thousand, six hundred twenty-one".