21697626424339 has 2 divisors, whose sum is σ = 21697626424340. Its totient is φ = 21697626424338.

The previous prime is 21697626424319. The next prime is 21697626424373. The reversal of 21697626424339 is 93342462679612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21697626424339 - 2³⁵ = 21663266685971 is a prime.

It is not a weakly prime, because it can be changed into another prime (21697626424319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10848813212169 + 10848813212170.

It is an arithmetic number, because the mean of its divisors is an integer number (10848813212170).

Almost surely, 2^{21697626424339} is an apocalyptic number.

21697626424339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21697626424339 is an equidigital number, since it uses as much as digits as its factorization.

21697626424339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141087744, while the sum is 64.

The spelling of 21697626424339 in words is "twenty-one trillion, six hundred ninety-seven billion, six hundred twenty-six million, four hundred twenty-four thousand, three hundred thirty-nine".