20530504404 has 24 divisors (see below), whose sum is σ = 53227233920. Its totient is φ = 6843501432.

The previous prime is 20530504399. The next prime is 20530504417. The reversal of 20530504404 is 40440503502.

20530504404 is a `hidden beast` number, since 205 + 3 + 0 + 50 + 4 + 404 = 666.

It is a super-2 number, since 2×20530504404² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 95048524 + ... + 95048739.

Almost surely, 2^20530504404 is an apocalyptic number.

It is an amenable number.

20530504404 is an abundant number, since it is smaller than the sum of its proper divisors (32696729516).

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

20530504404 is a wasteful number, since it uses less digits than its factorization.

20530504404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190097276 (or 190097268 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The spelling of 20530504404 in words is "twenty billion, five hundred thirty million, five hundred four thousand, four hundred four".