21202441404 has 24 divisors (see below), whose sum is σ = 49664869968. Its totient is φ = 7039979520.

The previous prime is 21202441349. The next prime is 21202441433. The reversal of 21202441404 is 40414420212.

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, 3434407 + ... + 3440574.

It is an arithmetic number, because the mean of its divisors is an integer number (2069369582).

Almost surely, 2^21202441404 is an apocalyptic number.

It is an amenable number.

21202441404 is an abundant number, since it is smaller than the sum of its proper divisors (28462428564).

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

21202441404 is a wasteful number, since it uses less digits than its factorization.

21202441404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6875245 (or 6875243 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21202441404 its reverse (40414420212), we get a palindrome (61616861616).

The spelling of 21202441404 in words is "twenty-one billion, two hundred two million, four hundred forty-one thousand, four hundred four".