20502430404 has 12 divisors (see below), whose sum is σ = 47839004304. Its totient is φ = 6834143464.

The previous prime is 20502430387. The next prime is 20502430433. The reversal of 20502430404 is 40403420502.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854267922 + ... + 854267945.

It is an arithmetic number, because the mean of its divisors is an integer number (3986583692).

Almost surely, 2^20502430404 is an apocalyptic number.

It is an amenable number.

20502430404 is an abundant number, since it is smaller than the sum of its proper divisors (27336573900).

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

20502430404 is a wasteful number, since it uses less digits than its factorization.

20502430404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708535874 (or 1708535872 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

Adding to 20502430404 its reverse (40403420502), we get a palindrome (60905850906).

The spelling of 20502430404 in words is "twenty billion, five hundred two million, four hundred thirty thousand, four hundred four".