20633351623 has 4 divisors (see below), whose sum is σ = 20643706528. Its totient is φ = 20622996720.

The previous prime is 20633351617. The next prime is 20633351653. The reversal of 20633351623 is 32615333602.

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 20633351623 - 2⁵ = 20633351591 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 (20633351653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5174463 + ... + 5178448.

It is an arithmetic number, because the mean of its divisors is an integer number (5160926632).

Almost surely, 2^20633351623 is an apocalyptic number.

20633351623 is a deficient number, since it is larger than the sum of its proper divisors (10354905).

20633351623 is a wasteful number, since it uses less digits than its factorization.

20633351623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10354904.

The product of its (nonzero) digits is 58320, while the sum is 34.

The spelling of 20633351623 in words is "twenty billion, six hundred thirty-three million, three hundred fifty-one thousand, six hundred twenty-three".