21926238061697 has 4 divisors (see below), whose sum is σ = 23080250591280. Its totient is φ = 20772225532116.

The previous prime is 21926238061603. The next prime is 21926238061699. The reversal of 21926238061697 is 79616083262912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21926238061697 - 2¹⁰ = 21926238060673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21926238061699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577006264763 + ... + 577006264800.

It is an arithmetic number, because the mean of its divisors is an integer number (5770062647820).

Almost surely, 2^{21926238061697} is an apocalyptic number.

It is an amenable number.

21926238061697 is a deficient number, since it is larger than the sum of its proper divisors (1154012529583).

21926238061697 is a wasteful number, since it uses less digits than its factorization.

21926238061697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154012529582.

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 21926238061697 in words is "twenty-one trillion, nine hundred twenty-six billion, two hundred thirty-eight million, sixty-one thousand, six hundred ninety-seven".