20580991015 has 16 divisors (see below), whose sum is σ = 26607694176. Its totient is φ = 15192144000.

The previous prime is 20580990973. The next prime is 20580991033. The reversal of 20580991015 is 51019908502.

It is not a de Polignac number, because 20580991015 - 2²⁷ = 20446773287 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 101965 + ... + 227065.

It is an arithmetic number, because the mean of its divisors is an integer number (1662980886).

Almost surely, 2^20580991015 is an apocalyptic number.

20580991015 is a deficient number, since it is larger than the sum of its proper divisors (6026703161).

20580991015 is a wasteful number, since it uses less digits than its factorization.

20580991015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127650.

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 20580991015 in words is "twenty billion, five hundred eighty million, nine hundred ninety-one thousand, fifteen".