21675432763 has 4 divisors (see below), whose sum is σ = 21684553960. Its totient is φ = 21666311568.

The previous prime is 21675432739. The next prime is 21675432799. The reversal of 21675432763 is 36723457612.

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 21675432763 - 2¹³ = 21675424571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21675433763) 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, 4557033 + ... + 4561786.

It is an arithmetic number, because the mean of its divisors is an integer number (5421138490).

Almost surely, 2^21675432763 is an apocalyptic number.

21675432763 is a deficient number, since it is larger than the sum of its proper divisors (9121197).

21675432763 is an equidigital number, since it uses as much as digits as its factorization.

21675432763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9121196.

The product of its digits is 1270080, while the sum is 46.

The spelling of 21675432763 in words is "twenty-one billion, six hundred seventy-five million, four hundred thirty-two thousand, seven hundred sixty-three".