20720758284 has 48 divisors (see below), whose sum is σ = 53768383200. Its totient is φ = 6900761088.

The previous prime is 20720758277. The next prime is 20720758291. The reversal of 20720758284 is 48285702702.

It is an interprime number because it is at equal distance from previous prime (20720758277) and next prime (20720758291).

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, 36964 + ... + 206900.

It is an arithmetic number, because the mean of its divisors is an integer number (1120174650).

Almost surely, 2^20720758284 is an apocalyptic number.

It is an amenable number.

20720758284 is an abundant number, since it is smaller than the sum of its proper divisors (33047624916).

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

20720758284 is a wasteful number, since it uses less digits than its factorization.

20720758284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171079 (or 171071 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 45.

The spelling of 20720758284 in words is "twenty billion, seven hundred twenty million, seven hundred fifty-eight thousand, two hundred eighty-four".