20511240011200 has 84 divisors (see below), whose sum is σ = 50726666011032. Its totient is φ = 8162848691200.

The previous prime is 20511240011167. The next prime is 20511240011201. The reversal of 20511240011200 is 211004211502.

It is a super-2 number, since 2×20511240011200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20511240011201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32221666 + ... + 32852065.

Almost surely, 2^{20511240011200} is an apocalyptic number.

20511240011200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20511240011200 is an abundant number, since it is smaller than the sum of its proper divisors (30215425999832).

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

20511240011200 is a wasteful number, since it uses less digits than its factorization.

20511240011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65073950 (or 65073935 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 20511240011200 its reverse (211004211502), we get a palindrome (20722244222702).

The spelling of 20511240011200 in words is "twenty trillion, five hundred eleven billion, two hundred forty million, eleven thousand, two hundred".