20400202104 has 32 divisors (see below), whose sum is σ = 51182018640. Its totient is φ = 6775865600.

The previous prime is 20400202087. The next prime is 20400202111. The reversal of 20400202104 is 40120200402.

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, 1505727 + ... + 1519214.

Almost surely, 2^20400202104 is an apocalyptic number.

20400202104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20400202104 is an abundant number, since it is smaller than the sum of its proper divisors (30781816536).

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

20400202104 is a wasteful number, since it uses less digits than its factorization.

20400202104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025231 (or 3025227 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20400202104 its reverse (40120200402), we get a palindrome (60520402506).

The spelling of 20400202104 in words is "twenty billion, four hundred million, two hundred two thousand, one hundred four".