20261172220600 has 48 divisors (see below), whose sum is σ = 47107605121200. Its totient is φ = 8104403562240.

The previous prime is 20261172220579. The next prime is 20261172220607. The reversal of 20261172220600 is 602227116202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261172220607) 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, 30181396 + ... + 30845404.

It is an arithmetic number, because the mean of its divisors is an integer number (981408440025).

Almost surely, 2^{20261172220600} is an apocalyptic number.

20261172220600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20261172220600 is an abundant number, since it is smaller than the sum of its proper divisors (26846432900600).

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

20261172220600 is a wasteful number, since it uses less digits than its factorization.

20261172220600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816592 (or 816583 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 20261172220600 its reverse (602227116202), we get a palindrome (20863399336802).

The spelling of 20261172220600 in words is "twenty trillion, two hundred sixty-one billion, one hundred seventy-two million, two hundred twenty thousand, six hundred".