20404143504 has 30 divisors (see below), whose sum is σ = 57103263126. Its totient is φ = 6801381120.

The previous prime is 20404143497. The next prime is 20404143521. The reversal of 20404143504 is 40534140402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20378133504 + 26010000 = 142752^2 + 5100^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70847577 + ... + 70847864.

Almost surely, 2^20404143504 is an apocalyptic number.

20404143504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20404143504 is an abundant number, since it is smaller than the sum of its proper divisors (36699119622).

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

20404143504 is a wasteful number, since it uses less digits than its factorization.

20404143504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141695455 (or 141695446 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 20404143504 its reverse (40534140402), we get a palindrome (60938283906).

The spelling of 20404143504 in words is "twenty billion, four hundred four million, one hundred forty-three thousand, five hundred four".