20104151454440 has 16 divisors (see below), whose sum is σ = 45234340772580. Its totient is φ = 8041660581760.

The previous prime is 20104151454349. The next prime is 20104151454487. The reversal of 20104151454440 is 4445415140102.

It can be written as a sum of positive squares in 2 ways, for example, as 17993936189476 + 2110215264964 = 4241926^2 + 1452658^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20104151454440.

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, 251301893141 + ... + 251301893220.

Almost surely, 2^{20104151454440} is an apocalyptic number.

20104151454440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20104151454440 is an abundant number, since it is smaller than the sum of its proper divisors (25130189318140).

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

20104151454440 is a wasteful number, since it uses less digits than its factorization.

20104151454440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502603786372 (or 502603786368 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 35.

Adding to 20104151454440 its reverse (4445415140102), we get a palindrome (24549566594542).

The spelling of 20104151454440 in words is "twenty trillion, one hundred four billion, one hundred fifty-one million, four hundred fifty-four thousand, four hundred forty".