20686114581 has 16 divisors (see below), whose sum is σ = 30091344960. Its totient is φ = 12536017920.

The previous prime is 20686114567. The next prime is 20686114591. The reversal of 20686114581 is 18541168602.

It is not a de Polignac number, because 20686114581 - 2⁷ = 20686114453 is a prime.

It is a super-2 number, since 2×20686114581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20686114541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662325 + ... + 692853.

It is an arithmetic number, because the mean of its divisors is an integer number (1880709060).

Almost surely, 2^20686114581 is an apocalyptic number.

It is an amenable number.

20686114581 is a deficient number, since it is larger than the sum of its proper divisors (9405230379).

20686114581 is a wasteful number, since it uses less digits than its factorization.

20686114581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51076.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 20686114581 in words is "twenty billion, six hundred eighty-six million, one hundred fourteen thousand, five hundred eighty-one".