20445285936936 has 32 divisors (see below), whose sum is σ = 58415102677440. Its totient is φ = 5841510267648.

The previous prime is 20445285936913. The next prime is 20445285937051. The reversal of 20445285936936 is 63963958254402.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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, 60849065121 + ... + 60849065456.

It is an arithmetic number, because the mean of its divisors is an integer number (1825471958670).

Almost surely, 2^{20445285936936} is an apocalyptic number.

It is an amenable number.

20445285936936 is an abundant number, since it is smaller than the sum of its proper divisors (37969816740504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20445285936936 is a wasteful number, since it uses less digits than its factorization.

20445285936936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121698130593 (or 121698130589 counting only the distinct ones).

The product of its (nonzero) digits is 335923200, while the sum is 66.

The spelling of 20445285936936 in words is "twenty trillion, four hundred forty-five billion, two hundred eighty-five million, nine hundred thirty-six thousand, nine hundred thirty-six".