23420621633 has 4 divisors (see below), whose sum is σ = 23427380400. Its totient is φ = 23413862868.

The previous prime is 23420621599. The next prime is 23420621641. The reversal of 23420621633 is 33612602432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23420621633 - 2⁶ = 23420621569 is a prime.

It is a super-2 number, since 2×23420621633² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23420621633.

It is not an unprimeable number, because it can be changed into a prime (23420621663) 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 3 ways as a sum of consecutive naturals, for example, 3374183 + ... + 3381116.

It is an arithmetic number, because the mean of its divisors is an integer number (5856845100).

Almost surely, 2^23420621633 is an apocalyptic number.

It is an amenable number.

23420621633 is a deficient number, since it is larger than the sum of its proper divisors (6758767).

23420621633 is an equidigital number, since it uses as much as digits as its factorization.

23420621633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758766.

The product of its (nonzero) digits is 31104, while the sum is 32.

The spelling of 23420621633 in words is "twenty-three billion, four hundred twenty million, six hundred twenty-one thousand, six hundred thirty-three".