20445222254402 has 24 divisors (see below), whose sum is σ = 33840435986028. Its totient is φ = 9257122181120.

The previous prime is 20445222254329. The next prime is 20445222254449.

20445222254402 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 16128970855921 + 4316251398481 = 4016089^2 + 2077559^2 .

It is a super-2 number, since 2×20445222254402² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164304323 + ... + 164428710.

Almost surely, 2^{20445222254402} is an apocalyptic number.

20445222254402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20445222254402 is a deficient number, since it is larger than the sum of its proper divisors (13395213731626).

20445222254402 is a wasteful number, since it uses less digits than its factorization.

20445222254402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328733314 (or 328733303 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 38.

It can be divided in two parts, 2044522 and 2254402, that added together give a palindrome (4298924).

The spelling of 20445222254402 in words is "twenty trillion, four hundred forty-five billion, two hundred twenty-two million, two hundred fifty-four thousand, four hundred two".