21926490138337 has 2 divisors, whose sum is σ = 21926490138338. Its totient is φ = 21926490138336.

The previous prime is 21926490138323. The next prime is 21926490138361. The reversal of 21926490138337 is 73383109462912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18775850938321 + 3150639200016 = 4333111^2 + 1775004^2 .

It is a cyclic number.

It is not a de Polignac number, because 21926490138337 - 2³⁵ = 21892130399969 is a prime.

It is not a weakly prime, because it can be changed into another prime (21926490138037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10963245069168 + 10963245069169.

It is an arithmetic number, because the mean of its divisors is an integer number (10963245069169).

Almost surely, 2^{21926490138337} is an apocalyptic number.

It is an amenable number.

21926490138337 is a deficient number, since it is larger than the sum of its proper divisors (1).

21926490138337 is an equidigital number, since it uses as much as digits as its factorization.

21926490138337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 58.

The spelling of 21926490138337 in words is "twenty-one trillion, nine hundred twenty-six billion, four hundred ninety million, one hundred thirty-eight thousand, three hundred thirty-seven".