21090762331024 has 45 divisors (see below), whose sum is σ = 40943983371123. Its totient is φ = 10524614025216.

The previous prime is 21090762330973. The next prime is 21090762331027. The reversal of 21090762331024 is 42013326709012.

The square root of 21090762331024 is 4592468.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1980155552400 + 19110606778624 = 1407180^2 + 4371568^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21090762331027) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14126430822 + ... + 14126432314.

Almost surely, 2^{21090762331024} is an apocalyptic number.

21090762331024 is the 4592468-th square number.

It is an amenable number.

21090762331024 is a deficient number, since it is larger than the sum of its proper divisors (19853221040099).

21090762331024 is an frugal number, since it uses more digits than its factorization.

21090762331024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532 (or 2264 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 21090762331024 in words is "twenty-one trillion, ninety billion, seven hundred sixty-two million, three hundred thirty-one thousand, twenty-four".