21200540204 has 12 divisors (see below), whose sum is σ = 37173838800. Its totient is φ = 10579443408.

The previous prime is 21200540189. The next prime is 21200540261. The reversal of 21200540204 is 40204500212.

It is a happy number.

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, 5204384 + ... + 5208455.

It is an arithmetic number, because the mean of its divisors is an integer number (3097819900).

Almost surely, 2^21200540204 is an apocalyptic number.

It is an amenable number.

21200540204 is a deficient number, since it is larger than the sum of its proper divisors (15973298596).

21200540204 is a wasteful number, since it uses less digits than its factorization.

21200540204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10413352 (or 10413350 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The spelling of 21200540204 in words is "twenty-one billion, two hundred million, five hundred forty thousand, two hundred four".