21926490138323 has 2 divisors, whose sum is σ = 21926490138324. Its totient is φ = 21926490138322.

The previous prime is 21926490138253. The next prime is 21926490138337. The reversal of 21926490138323 is 32383109462912.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21926490138323 - 2²⁸ = 21926221702867 is a prime.

It is not a weakly prime, because it can be changed into another prime (21926490134323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10963245069161 + 10963245069162.

It is an arithmetic number, because the mean of its divisors is an integer number (10963245069162).

Almost surely, 2^{21926490138323} is an apocalyptic number.

21926490138323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21926490138323 is an equidigital number, since it uses as much as digits as its factorization.

21926490138323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 21926490138323 in words is "twenty-one trillion, nine hundred twenty-six billion, four hundred ninety million, one hundred thirty-eight thousand, three hundred twenty-three".