20445839236 has 24 divisors (see below), whose sum is σ = 37393695360. Its totient is φ = 9763302912.

The previous prime is 20445839233. The next prime is 20445839261. The reversal of 20445839236 is 63293854402.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (20445839233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112221 + ... + 231268.

It is an arithmetic number, because the mean of its divisors is an integer number (1558070640).

Almost surely, 2^20445839236 is an apocalyptic number.

It is an amenable number.

20445839236 is a deficient number, since it is larger than the sum of its proper divisors (16947856124).

20445839236 is a wasteful number, since it uses less digits than its factorization.

20445839236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344163 (or 344161 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 20445839236 in words is "twenty billion, four hundred forty-five million, eight hundred thirty-nine thousand, two hundred thirty-six".