21863762495 has 8 divisors (see below), whose sum is σ = 26237579616. Its totient is φ = 17490300256.

The previous prime is 21863762449. The next prime is 21863762497. The reversal of 21863762495 is 59426736812.

It is a Cunningham number, because it is equal to 147864²-1.

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 21863762495 - 2²⁶ = 21796653631 is a prime.

It is a super-2 number, since 2×21863762495² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21863762497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73934 + ... + 221796.

It is an arithmetic number, because the mean of its divisors is an integer number (3279697452).

Almost surely, 2^21863762495 is an apocalyptic number.

21863762495 is a deficient number, since it is larger than the sum of its proper divisors (4373817121).

21863762495 is a wasteful number, since it uses less digits than its factorization.

21863762495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177441.

The product of its digits is 4354560, while the sum is 53.

The spelling of 21863762495 in words is "twenty-one billion, eight hundred sixty-three million, seven hundred sixty-two thousand, four hundred ninety-five".