20615207676 has 72 divisors (see below), whose sum is σ = 56108618496. Its totient is φ = 5873948640.

The previous prime is 20615207659. The next prime is 20615207693. The reversal of 20615207676 is 67670251602.

It is an interprime number because it is at equal distance from previous prime (20615207659) and next prime (20615207693).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 168031 + ... + 263561.

It is an arithmetic number, because the mean of its divisors is an integer number (779286368).

Almost surely, 2^20615207676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20615207676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28054309248).

20615207676 is an abundant number, since it is smaller than the sum of its proper divisors (35493410820).

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

20615207676 is a wasteful number, since it uses less digits than its factorization.

20615207676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95919 (or 95910 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 20615207676 in words is "twenty billion, six hundred fifteen million, two hundred seven thousand, six hundred seventy-six".