21348964804036 has 27 divisors (see below), whose sum is σ = 37411066469581. Its totient is φ = 10660108045184.

The previous prime is 21348964803979. The next prime is 21348964804067. The reversal of 21348964804036 is 63040846984312.

The square root of 21348964804036 is 4620494.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10282963370436 + 11066001433600 = 3206706^2 + 3326560^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11301727380 + ... + 11301729268.

Almost surely, 2^{21348964804036} is an apocalyptic number.

21348964804036 is the 4620494-th square number.

It is an amenable number.

21348964804036 is a deficient number, since it is larger than the sum of its proper divisors (16062101665545).

21348964804036 is an frugal number, since it uses more digits than its factorization.

21348964804036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6228 (or 3114 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 58.

The spelling of 21348964804036 in words is "twenty-one trillion, three hundred forty-eight billion, nine hundred sixty-four million, eight hundred four thousand, thirty-six".