22635643451 has 4 divisors (see below), whose sum is σ = 22813876992. Its totient is φ = 22457409912.

The previous prime is 22635643427. The next prime is 22635643469. The reversal of 22635643451 is 15434653622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15434653622 = 2 ⋅7717326811.

It is a cyclic number.

It is not a de Polignac number, because 22635643451 - 2²² = 22631449147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22635643399 and 22635643408.

It is not an unprimeable number, because it can be changed into a prime (22635643651) 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, 89116580 + ... + 89116833.

It is an arithmetic number, because the mean of its divisors is an integer number (5703469248).

Almost surely, 2^22635643451 is an apocalyptic number.

22635643451 is a deficient number, since it is larger than the sum of its proper divisors (178233541).

22635643451 is a wasteful number, since it uses less digits than its factorization.

22635643451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178233540.

The product of its digits is 518400, while the sum is 41.

The spelling of 22635643451 in words is "twenty-two billion, six hundred thirty-five million, six hundred forty-three thousand, four hundred fifty-one".