21202056204 has 48 divisors (see below), whose sum is σ = 56822976000. Its totient is φ = 6027284736.

The previous prime is 21202056199. The next prime is 21202056229. The reversal of 21202056204 is 40265020212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617469 + ... + 650900.

It is an arithmetic number, because the mean of its divisors is an integer number (1183812000).

Almost surely, 2^21202056204 is an apocalyptic number.

It is an amenable number.

21202056204 is an abundant number, since it is smaller than the sum of its proper divisors (35620919796).

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

21202056204 is a wasteful number, since it uses less digits than its factorization.

21202056204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268582 (or 1268580 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21202056204 its reverse (40265020212), we get a palindrome (61467076416).

The spelling of 21202056204 in words is "twenty-one billion, two hundred two million, fifty-six thousand, two hundred four".