20005111437200 has 60 divisors (see below), whose sum is σ = 48487610250948. Its totient is φ = 7931230003200.

The previous prime is 20005111437163. The next prime is 20005111437217. The reversal of 20005111437200 is 273411150002.

It can be written as a sum of positive squares in 6 ways, for example, as 5243440500736 + 14761670936464 = 2289856^2 + 3842092^2 .

It is a super-2 number, since 2×20005111437200² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20005111437200.

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, 221250281 + ... + 221340680.

Almost surely, 2^{20005111437200} is an apocalyptic number.

20005111437200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20005111437200 is an abundant number, since it is smaller than the sum of its proper divisors (28482498813748).

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

20005111437200 is a wasteful number, since it uses less digits than its factorization.

20005111437200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442591092 (or 442591081 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 20005111437200 its reverse (273411150002), we get a palindrome (20278522587202).

The spelling of 20005111437200 in words is "twenty trillion, five billion, one hundred eleven million, four hundred thirty-seven thousand, two hundred".