20159262281 has 2 divisors, whose sum is σ = 20159262282. Its totient is φ = 20159262280.

The previous prime is 20159262239. The next prime is 20159262289. The reversal of 20159262281 is 18226295102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17747568400 + 2411693881 = 133220^2 + 49109^2 .

It is a cyclic number.

It is not a de Polignac number, because 20159262281 - 2³⁰ = 19085520457 is a prime.

It is a super-2 number, since 2×20159262281² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20159262289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10079631140 + 10079631141.

It is an arithmetic number, because the mean of its divisors is an integer number (10079631141).

Almost surely, 2^20159262281 is an apocalyptic number.

It is an amenable number.

20159262281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20159262281 is an equidigital number, since it uses as much as digits as its factorization.

20159262281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 20159262281 in words is "twenty billion, one hundred fifty-nine million, two hundred sixty-two thousand, two hundred eighty-one".