21343131204 has 24 divisors (see below), whose sum is σ = 49842840768. Its totient is φ = 7108348320.

The previous prime is 21343131169. The next prime is 21343131211. The reversal of 21343131204 is 40213134312.

It is a happy 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, 738832 + ... + 767175.

It is an arithmetic number, because the mean of its divisors is an integer number (2076785032).

Almost surely, 2^21343131204 is an apocalyptic number.

It is an amenable number.

21343131204 is an abundant number, since it is smaller than the sum of its proper divisors (28499709564).

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

21343131204 is a wasteful number, since it uses less digits than its factorization.

21343131204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507195 (or 1507193 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21343131204 its reverse (40213134312), we get a palindrome (61556265516).

The spelling of 21343131204 in words is "twenty-one billion, three hundred forty-three million, one hundred thirty-one thousand, two hundred four".