21715827263 has 8 divisors (see below), whose sum is σ = 24617132400. Its totient is φ = 18990358848.

The previous prime is 21715827253. The next prime is 21715827283. The reversal of 21715827263 is 36272851712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21715827263 - 2¹⁰ = 21715826239 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 (21715827233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43958918 + ... + 43959411.

It is an arithmetic number, because the mean of its divisors is an integer number (3077141550).

Almost surely, 2^21715827263 is an apocalyptic number.

21715827263 is a deficient number, since it is larger than the sum of its proper divisors (2901305137).

21715827263 is a wasteful number, since it uses less digits than its factorization.

21715827263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87918361.

The product of its digits is 282240, while the sum is 44.

The spelling of 21715827263 in words is "twenty-one billion, seven hundred fifteen million, eight hundred twenty-seven thousand, two hundred sixty-three".