20603720615 has 16 divisors (see below), whose sum is σ = 24859560960. Its totient is φ = 16393026720.

The previous prime is 20603720587. The next prime is 20603720647. The reversal of 20603720615 is 51602730602.

It is not a de Polignac number, because 20603720615 - 2³⁰ = 19529978791 is a prime.

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, 1638482 + ... + 1651008.

It is an arithmetic number, because the mean of its divisors is an integer number (1553722560).

Almost surely, 2^20603720615 is an apocalyptic number.

20603720615 is a deficient number, since it is larger than the sum of its proper divisors (4255840345).

20603720615 is a wasteful number, since it uses less digits than its factorization.

20603720615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14302.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 20603720615 in words is "twenty billion, six hundred three million, seven hundred twenty thousand, six hundred fifteen".