21523074304 has 36 divisors (see below), whose sum is σ = 44443540260. Its totient is φ = 10390446080.

The previous prime is 21523074301. The next prime is 21523074311. The reversal of 21523074304 is 40347032512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10633734400 + 10889339904 = 103120^2 + 104352^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523074301) 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, 1442137 + ... + 1456984.

It is an arithmetic number, because the mean of its divisors is an integer number (1234542785).

Almost surely, 2^21523074304 is an apocalyptic number.

It is an amenable number.

21523074304 is an abundant number, since it is smaller than the sum of its proper divisors (22920465956).

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

21523074304 is an equidigital number, since it uses as much as digits as its factorization.

21523074304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899166 (or 2899152 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The spelling of 21523074304 in words is "twenty-one billion, five hundred twenty-three million, seventy-four thousand, three hundred four".