20660039439600 has 180 divisors, whose sum is σ = 72744397781048. Its totient is φ = 5008494374400.

The previous prime is 20660039439563. The next prime is 20660039439607. The reversal of 20660039439600 is 693493006602.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 20660039439600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660039439607) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70998187 + ... + 71288586.

Almost surely, 2^{20660039439600} is an apocalyptic number.

20660039439600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20660039439600 is an abundant number, since it is smaller than the sum of its proper divisors (52084358341448).

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

20660039439600 is a wasteful number, since it uses less digits than its factorization.

20660039439600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142286816 (or 142286794 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 48.

The spelling of 20660039439600 in words is "twenty trillion, six hundred sixty billion, thirty-nine million, four hundred thirty-nine thousand, six hundred".