20435680404 has 48 divisors (see below), whose sum is σ = 53017440000. Its totient is φ = 6807259008.

The previous prime is 20435680403. The next prime is 20435680427. The reversal of 20435680404 is 40408653402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20435680403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96972 + ... + 224220.

It is an arithmetic number, because the mean of its divisors is an integer number (1104530000).

Almost surely, 2^20435680404 is an apocalyptic number.

It is an amenable number.

20435680404 is an abundant number, since it is smaller than the sum of its proper divisors (32581759596).

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

20435680404 is a wasteful number, since it uses less digits than its factorization.

20435680404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128749 (or 128741 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 20435680404 in words is "twenty billion, four hundred thirty-five million, six hundred eighty thousand, four hundred four".