20616535615 has 24 divisors (see below), whose sum is σ = 27054649728. Its totient is φ = 15073718400.

The previous prime is 20616535601. The next prime is 20616535627. The reversal of 20616535615 is 51653561602.

It is not a de Polignac number, because 20616535615 - 2⁷ = 20616535487 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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 23 ways as a sum of consecutive naturals, for example, 35439 + ... + 206128.

It is an arithmetic number, because the mean of its divisors is an integer number (1127277072).

Almost surely, 2^20616535615 is an apocalyptic number.

20616535615 is a deficient number, since it is larger than the sum of its proper divisors (6438114113).

20616535615 is a wasteful number, since it uses less digits than its factorization.

20616535615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241699 (or 241686 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 20616535615 in words is "twenty billion, six hundred sixteen million, five hundred thirty-five thousand, six hundred fifteen".