21452107417657 has 4 divisors (see below), whose sum is σ = 24516694191616. Its totient is φ = 18387520643700.

The previous prime is 21452107417627. The next prime is 21452107417757. The reversal of 21452107417657 is 75671470125412.

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 21452107417657 - 2⁷ = 21452107417529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21452107417627) 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, 1532293386969 + ... + 1532293386982.

It is an arithmetic number, because the mean of its divisors is an integer number (6129173547904).

Almost surely, 2^{21452107417657} is an apocalyptic number.

It is an amenable number.

21452107417657 is a deficient number, since it is larger than the sum of its proper divisors (3064586773959).

21452107417657 is an equidigital number, since it uses as much as digits as its factorization.

21452107417657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064586773958.

The product of its (nonzero) digits is 3292800, while the sum is 52.

The spelling of 21452107417657 in words is "twenty-one trillion, four hundred fifty-two billion, one hundred seven million, four hundred seventeen thousand, six hundred fifty-seven".