21622673772563 has 4 divisors (see below), whose sum is σ = 22562790023568. Its totient is φ = 20682557521560.

The previous prime is 21622673772451. The next prime is 21622673772589. The reversal of 21622673772563 is 36527737622612.

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 21622673772563 - 2²⁶ = 21622606663699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21622673762563) 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, 470058125468 + ... + 470058125513.

It is an arithmetic number, because the mean of its divisors is an integer number (5640697505892).

Almost surely, 2^{21622673772563} is an apocalyptic number.

21622673772563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21622673772563 is a deficient number, since it is larger than the sum of its proper divisors (940116251005).

21622673772563 is an equidigital number, since it uses as much as digits as its factorization.

21622673772563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940116251004.

The product of its digits is 53343360, while the sum is 59.

The spelling of 21622673772563 in words is "twenty-one trillion, six hundred twenty-two billion, six hundred seventy-three million, seven hundred seventy-two thousand, five hundred sixty-three".