20511044513200 has 60 divisors (see below), whose sum is σ = 50867390423488. Its totient is φ = 7939759161600.

The previous prime is 20511044513147. The next prime is 20511044513243. The reversal of 20511044513200 is 231544011502.

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, 827045847 + ... + 827070646.

Almost surely, 2^{20511044513200} is an apocalyptic number.

20511044513200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20511044513200 is an abundant number, since it is smaller than the sum of its proper divisors (30356345910288).

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

20511044513200 is a wasteful number, since it uses less digits than its factorization.

20511044513200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654116542 (or 1654116531 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 20511044513200 its reverse (231544011502), we get a palindrome (20742588524702).

The spelling of 20511044513200 in words is "twenty trillion, five hundred eleven billion, forty-four million, five hundred thirteen thousand, two hundred".