20423814408 has 48 divisors (see below), whose sum is σ = 56809491180. Its totient is φ = 6623938944.

The previous prime is 20423814401. The next prime is 20423814409. The reversal of 20423814408 is 80441832402.

20423814408 is a `hidden beast` number, since 2 + 0 + 4 + 238 + 14 + 408 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15615501444 + 4808312964 = 124962^2 + 69342^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20423814401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3830635 + ... + 3835962.

Almost surely, 2^20423814408 is an apocalyptic number.

It is an amenable number.

20423814408 is an abundant number, since it is smaller than the sum of its proper divisors (36385676772).

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

20423814408 is a wasteful number, since it uses less digits than its factorization.

20423814408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666646 (or 7666639 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The spelling of 20423814408 in words is "twenty billion, four hundred twenty-three million, eight hundred fourteen thousand, four hundred eight".