20397581059 has 8 divisors (see below), whose sum is σ = 20461669200. Its totient is φ = 20333525856.

The previous prime is 20397581051. The next prime is 20397581063. The reversal of 20397581059 is 95018579302.

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 20397581059 - 2³ = 20397581051 is a prime.

It is a super-2 number, since 2×20397581059² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20397581051) 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, 1916637 + ... + 1927249.

It is an arithmetic number, because the mean of its divisors is an integer number (2557708650).

Almost surely, 2^20397581059 is an apocalyptic number.

20397581059 is a deficient number, since it is larger than the sum of its proper divisors (64088141).

20397581059 is a wasteful number, since it uses less digits than its factorization.

20397581059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16469.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 20397581059 in words is "twenty billion, three hundred ninety-seven million, five hundred eighty-one thousand, fifty-nine".