20444633345 has 4 divisors (see below), whose sum is σ = 24533560020. Its totient is φ = 16355706672.

The previous prime is 20444633317. The next prime is 20444633389. The reversal of 20444633345 is 54333644402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15367073296 + 5077560049 = 123964^2 + 71257^2 .

It is a cyclic number.

It is not a de Polignac number, because 20444633345 - 2⁸ = 20444633089 is a prime.

It is a super-2 number, since 2×20444633345² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20444633299 and 20444633308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2044463330 + ... + 2044463339.

It is an arithmetic number, because the mean of its divisors is an integer number (6133390005).

Almost surely, 2^20444633345 is an apocalyptic number.

It is an amenable number.

20444633345 is a deficient number, since it is larger than the sum of its proper divisors (4088926675).

20444633345 is an equidigital number, since it uses as much as digits as its factorization.

20444633345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088926674.

The product of its (nonzero) digits is 414720, while the sum is 38.

The spelling of 20444633345 in words is "twenty billion, four hundred forty-four million, six hundred thirty-three thousand, three hundred forty-five".