20255204440400 has 60 divisors (see below), whose sum is σ = 51224345985600. Its totient is φ = 7675656416640.

The previous prime is 20255204440291. The next prime is 20255204440433. The reversal of 20255204440400 is 404440255202.

It is a congruent number.

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, 1332571640 + ... + 1332586839.

It is an arithmetic number, because the mean of its divisors is an integer number (853739099760).

Almost surely, 2^{20255204440400} is an apocalyptic number.

20255204440400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20255204440400 is an abundant number, since it is smaller than the sum of its proper divisors (30969141545200).

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

20255204440400 is a wasteful number, since it uses less digits than its factorization.

20255204440400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665158516 (or 2665158505 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 32.

Adding to 20255204440400 its reverse (404440255202), we get a palindrome (20659644695602).

The spelling of 20255204440400 in words is "twenty trillion, two hundred fifty-five billion, two hundred four million, four hundred forty thousand, four hundred".