21523159607039 has 4 divisors (see below), whose sum is σ = 21524159914824. Its totient is φ = 21522159299256.

The previous prime is 21523159607023. The next prime is 21523159607041. The reversal of 21523159607039 is 93070695132512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21523159607039 - 2⁴ = 21523159607023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523159007039) 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, 500121617 + ... + 500164650.

It is an arithmetic number, because the mean of its divisors is an integer number (5381039978706).

Almost surely, 2^{21523159607039} is an apocalyptic number.

21523159607039 is a deficient number, since it is larger than the sum of its proper divisors (1000307785).

21523159607039 is a wasteful number, since it uses less digits than its factorization.

21523159607039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000307784.

The product of its (nonzero) digits is 3061800, while the sum is 53.

The spelling of 21523159607039 in words is "twenty-one trillion, five hundred twenty-three billion, one hundred fifty-nine million, six hundred seven thousand, thirty-nine".