20501220612 has 24 divisors (see below), whose sum is σ = 47838772800. Its totient is φ = 6833370016.

The previous prime is 20501220587. The next prime is 20501220667. The reversal of 20501220612 is 21602210502.

It is a happy 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, 272089 + ... + 339167.

It is an arithmetic number, because the mean of its divisors is an integer number (1993282200).

Almost surely, 2^20501220612 is an apocalyptic number.

It is an amenable number.

20501220612 is an abundant number, since it is smaller than the sum of its proper divisors (27337552188).

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

20501220612 is a wasteful number, since it uses less digits than its factorization.

20501220612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92555 (or 92553 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 20501220612 in words is "twenty billion, five hundred one million, two hundred twenty thousand, six hundred twelve".