21009276523274 has 64 divisors (see below), whose sum is σ = 35025247386528. Its totient is φ = 9391292928000.

The previous prime is 21009276523253. The next prime is 21009276523327. The reversal of 21009276523274 is 47232567290012.

It can be written as a sum of positive squares in 16 ways, for example, as 3160126225 + 21006116397049 = 56215^2 + 4583243^2 .

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 31 ways as a sum of consecutive naturals, for example, 69431612 + ... + 69733544.

Almost surely, 2^{21009276523274} is an apocalyptic number.

21009276523274 is a deficient number, since it is larger than the sum of its proper divisors (14015970863254).

21009276523274 is a wasteful number, since it uses less digits than its factorization.

21009276523274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302683.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 21009276523274 in words is "twenty-one trillion, nine billion, two hundred seventy-six million, five hundred twenty-three thousand, two hundred seventy-four".