20081162402401 has 3 divisors (see below), whose sum is σ = 20081166883603. Its totient is φ = 20081157921200.

The previous prime is 20081162402341. The next prime is 20081162402453. The reversal of 20081162402401 is 10420426118002.

The square root of 20081162402401 is 4481201.

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.

It can be written as a sum of positive squares in only one way, i.e., 19191837960801 + 889324441600 = 4380849^2 + 943040^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20081162402401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20081162402491) 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, 2240601 + ... + 6721801.

Almost surely, 2^{20081162402401} is an apocalyptic number.

20081162402401 is the 4481201-st square number.

20081162402401 is the 2240601-st centered octagonal number.

It is an amenable number.

20081162402401 is a deficient number, since it is larger than the sum of its proper divisors (4481202).

20081162402401 is an frugal number, since it uses more digits than its factorization.

20081162402401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8962402 (or 4481201 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The spelling of 20081162402401 in words is "twenty trillion, eighty-one billion, one hundred sixty-two million, four hundred two thousand, four hundred one".