20412799605 has 32 divisors (see below), whose sum is σ = 39588462720. Its totient is φ = 9897114240.

The previous prime is 20412799597. The next prime is 20412799609. The reversal of 20412799605 is 50699721402.

20412799605 is a `hidden beast` number, since 20 + 4 + 12 + 7 + 9 + 9 + 605 = 666.

It is not a de Polignac number, because 20412799605 - 2³ = 20412799597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20412799609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6871512 + ... + 6874481.

It is an arithmetic number, because the mean of its divisors is an integer number (1237139460).

Almost surely, 2^20412799605 is an apocalyptic number.

It is an amenable number.

20412799605 is a deficient number, since it is larger than the sum of its proper divisors (19175663115).

20412799605 is a wasteful number, since it uses less digits than its factorization.

20412799605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13746018 (or 13746012 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 20412799605 in words is "twenty billion, four hundred twelve million, seven hundred ninety-nine thousand, six hundred five".