20636612417 has 8 divisors (see below), whose sum is σ = 21118537440. Its totient is φ = 20154778560.

The previous prime is 20636612413. The next prime is 20636612419. The reversal of 20636612417 is 71421663602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20636612417 - 2² = 20636612413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20636612411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697634 + ... + 726612.

It is an arithmetic number, because the mean of its divisors is an integer number (2639817180).

Almost surely, 2^20636612417 is an apocalyptic number.

It is an amenable number.

20636612417 is a deficient number, since it is larger than the sum of its proper divisors (481925023).

20636612417 is a wasteful number, since it uses less digits than its factorization.

20636612417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45583.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 20636612417 in words is "twenty billion, six hundred thirty-six million, six hundred twelve thousand, four hundred seventeen".