21268999932790 has 16 divisors (see below), whose sum is σ = 38370620202768. Its totient is φ = 8488395456736.

The previous prime is 21268999932769. The next prime is 21268999932821. The reversal of 21268999932790 is 9723999986212.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 2400559897 + ... + 2400568756.

It is an arithmetic number, because the mean of its divisors is an integer number (2398163762673).

Almost surely, 2^{21268999932790} is an apocalyptic number.

21268999932790 is a deficient number, since it is larger than the sum of its proper divisors (17101620269978).

21268999932790 is a wasteful number, since it uses less digits than its factorization.

21268999932790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801129103.

The product of its (nonzero) digits is 476171136, while the sum is 76.

The spelling of 21268999932790 in words is "twenty-one trillion, two hundred sixty-eight billion, nine hundred ninety-nine million, nine hundred thirty-two thousand, seven hundred ninety".