20612732405 has 8 divisors (see below), whose sum is σ = 24748682112. Its totient is φ = 16481250448.

The previous prime is 20612732347. The next prime is 20612732471. The reversal of 20612732405 is 50423721602.

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 20612732405 - 2⁸ = 20612732149 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 7 ways as a sum of consecutive naturals, for example, 1106777 + ... + 1125246.

It is an arithmetic number, because the mean of its divisors is an integer number (3093585264).

Almost surely, 2^20612732405 is an apocalyptic number.

It is an amenable number.

20612732405 is a deficient number, since it is larger than the sum of its proper divisors (4135949707).

20612732405 is a wasteful number, since it uses less digits than its factorization.

20612732405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233875.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 20612732405 in words is "twenty billion, six hundred twelve million, seven hundred thirty-two thousand, four hundred five".