20369033881 has 12 divisors (see below), whose sum is σ = 23904283572. Its totient is φ = 17304661248.

The previous prime is 20369033863. The next prime is 20369033899. The reversal of 20369033881 is 18833096302.

It is an interprime number because it is at equal distance from previous prime (20369033863) and next prime (20369033899).

It can be written as a sum of positive squares in 2 ways, for example, as 400800400 + 19968233481 = 20020^2 + 141309^2 .

It is not a de Polignac number, because 20369033881 - 2⁷ = 20369033753 is a prime.

It is a super-2 number, since 2×20369033881² (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 (20369033801) 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, 1833820 + ... + 1844893.

It is an arithmetic number, because the mean of its divisors is an integer number (1992023631).

Almost surely, 2^20369033881 is an apocalyptic number.

It is an amenable number.

20369033881 is a deficient number, since it is larger than the sum of its proper divisors (3535249691).

20369033881 is a wasteful number, since it uses less digits than its factorization.

20369033881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678840 (or 3678833 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 20369033881 in words is "twenty billion, three hundred sixty-nine million, thirty-three thousand, eight hundred eighty-one".