21323807073051 has 16 divisors (see below), whose sum is σ = 32550326485248. Its totient is φ = 12163692794400.

The previous prime is 21323807072947. The next prime is 21323807073067. The reversal of 21323807073051 is 15037070832312.

It is not a de Polignac number, because 21323807073051 - 2⁹ = 21323807072539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21323807072994 and 21323807073012.

It is not an unprimeable number, because it can be changed into a prime (21323807073551) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 889146840 + ... + 889170821.

It is an arithmetic number, because the mean of its divisors is an integer number (2034395405328).

Almost surely, 2^{21323807073051} is an apocalyptic number.

21323807073051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21323807073051 is a deficient number, since it is larger than the sum of its proper divisors (11226519412197).

21323807073051 is a wasteful number, since it uses less digits than its factorization.

21323807073051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778318242.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 21323807073051 in words is "twenty-one trillion, three hundred twenty-three billion, eight hundred seven million, seventy-three thousand, fifty-one".