20397242838700 has 72 divisors (see below), whose sum is σ = 54476328590432. Its totient is φ = 6455391137280.

The previous prime is 20397242838689. The next prime is 20397242838701. The reversal of 20397242838700 is 783824279302.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20397242838701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1120718529 + ... + 1120736728.

Almost surely, 2^{20397242838700} is an apocalyptic number.

20397242838700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20397242838700 is an abundant number, since it is smaller than the sum of its proper divisors (34079085751732).

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

20397242838700 is a wasteful number, since it uses less digits than its factorization.

20397242838700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241455291 (or 2241455284 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 20397242838700 in words is "twenty trillion, three hundred ninety-seven billion, two hundred forty-two million, eight hundred thirty-eight thousand, seven hundred".