20281518867597 has 16 divisors (see below), whose sum is σ = 29799440962368. Its totient is φ = 12190680391680.

The previous prime is 20281518867517. The next prime is 20281518867629. The reversal of 20281518867597 is 79576881518202.

It is not a de Polignac number, because 20281518867597 - 2²² = 20281514673293 is a prime.

It is a super-2 number, since 2×20281518867597² (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 (20281518867517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6046962804 + ... + 6046966157.

It is an arithmetic number, because the mean of its divisors is an integer number (1862465060148).

Almost surely, 2^{20281518867597} is an apocalyptic number.

It is an amenable number.

20281518867597 is a deficient number, since it is larger than the sum of its proper divisors (9517922094771).

20281518867597 is a wasteful number, since it uses less digits than its factorization.

20281518867597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12093929020.

The product of its (nonzero) digits is 135475200, while the sum is 69.

The spelling of 20281518867597 in words is "twenty trillion, two hundred eighty-one billion, five hundred eighteen million, eight hundred sixty-seven thousand, five hundred ninety-seven".