20337326881 has 3 divisors (see below), whose sum is σ = 20337469491. Its totient is φ = 20337184272.

The previous prime is 20337326839. The next prime is 20337326921. The reversal of 20337326881 is 18862373302.

The square root of 20337326881 is 142609.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18862373302 = 2 ⋅9431186651.

It can be written as a sum of positive squares in only one way, i.e., 17998637281 + 2338689600 = 134159^2 + 48360^2 .

It is not a de Polignac number, because 20337326881 - 2⁷ = 20337326753 is a prime.

It is a super-2 number, since 2×20337326881² (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 (20337326281) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 71305 + ... + 213913.

It is an arithmetic number, because the mean of its divisors is an integer number (6779156497).

Almost surely, 2^20337326881 is an apocalyptic number.

20337326881 is the 142609-th square number.

20337326881 is the 71305-th centered octagonal number.

It is an amenable number.

20337326881 is a deficient number, since it is larger than the sum of its proper divisors (142610).

20337326881 is an frugal number, since it uses more digits than its factorization.

20337326881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285218 (or 142609 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 20337326881 in words is "twenty billion, three hundred thirty-seven million, three hundred twenty-six thousand, eight hundred eighty-one".