21492464663 has 8 divisors (see below), whose sum is σ = 21847760640. Its totient is φ = 21139697920.

The previous prime is 21492464639. The next prime is 21492464671. The reversal of 21492464663 is 36646429412.

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 21492464663 - 2⁸ = 21492464407 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 (21492467663) 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, 615170 + ... + 649167.

It is an arithmetic number, because the mean of its divisors is an integer number (2730970080).

Almost surely, 2^21492464663 is an apocalyptic number.

21492464663 is a deficient number, since it is larger than the sum of its proper divisors (355295977).

21492464663 is a wasteful number, since it uses less digits than its factorization.

21492464663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264617.

The product of its digits is 1492992, while the sum is 47.

The spelling of 21492464663 in words is "twenty-one billion, four hundred ninety-two million, four hundred sixty-four thousand, six hundred sixty-three".