21403202204 has 12 divisors (see below), whose sum is σ = 37471079184. Its totient is φ = 10697179584.

The previous prime is 21403202153. The next prime is 21403202209. The reversal of 21403202204 is 40220230412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403202209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094477 + ... + 1113860.

It is an arithmetic number, because the mean of its divisors is an integer number (3122589932).

Almost surely, 2^21403202204 is an apocalyptic number.

It is an amenable number.

21403202204 is a deficient number, since it is larger than the sum of its proper divisors (16067876980).

21403202204 is a wasteful number, since it uses less digits than its factorization.

21403202204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210764 (or 2210762 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21403202204 its reverse (40220230412), we get a palindrome (61623432616).

The spelling of 21403202204 in words is "twenty-one billion, four hundred three million, two hundred two thousand, two hundred four".