20261172220599 has 8 divisors (see below), whose sum is σ = 27015021815040. Its totient is φ = 13507385386616.

The previous prime is 20261172220579. The next prime is 20261172220607. The reversal of 20261172220599 is 99502227116202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20261172220599 - 2⁸ = 20261172220343 is a prime.

It is a super-2 number, since 2×20261172220599² (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 (20261172220579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14931597 + ... + 16231910.

It is an arithmetic number, because the mean of its divisors is an integer number (3376877726880).

Almost surely, 2^{20261172220599} is an apocalyptic number.

20261172220599 is a deficient number, since it is larger than the sum of its proper divisors (6753849594441).

20261172220599 is a wasteful number, since it uses less digits than its factorization.

20261172220599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31380229.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 20261172220599 in words is "twenty trillion, two hundred sixty-one billion, one hundred seventy-two million, two hundred twenty thousand, five hundred ninety-nine".