20464220616 has 64 divisors (see below), whose sum is σ = 58503772800. Its totient is φ = 5843463168.

The previous prime is 20464220551. The next prime is 20464220627. The reversal of 20464220616 is 61602246402.

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, 256000 + ... + 326288.

It is an arithmetic number, because the mean of its divisors is an integer number (914121450).

Almost surely, 2^20464220616 is an apocalyptic number.

It is an amenable number.

20464220616 is an abundant number, since it is smaller than the sum of its proper divisors (38039552184).

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

20464220616 is a wasteful number, since it uses less digits than its factorization.

20464220616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72038 (or 72034 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 20464220616 in words is "twenty billion, four hundred sixty-four million, two hundred twenty thousand, six hundred sixteen".