21926490138321 has 8 divisors (see below), whose sum is σ = 29356628567904. Its totient is φ = 14557005900480.

The previous prime is 21926490138253. The next prime is 21926490138323. The reversal of 21926490138321 is 12383109462912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21926490138321 - 2²² = 21926485944017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21926490138323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15163547091 + ... + 15163548536.

It is an arithmetic number, because the mean of its divisors is an integer number (3669578570988).

Almost surely, 2^{21926490138321} is an apocalyptic number.

It is an amenable number.

21926490138321 is a deficient number, since it is larger than the sum of its proper divisors (7430138429583).

21926490138321 is a wasteful number, since it uses less digits than its factorization.

21926490138321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30327095871.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 21926490138321 in words is "twenty-one trillion, nine hundred twenty-six billion, four hundred ninety million, one hundred thirty-eight thousand, three hundred twenty-one".