20261115 has 48 divisors (see below), whose sum is σ = 40525056. Its totient is φ = 9172800.

The previous prime is 20261113. The next prime is 20261119. The reversal of 20261115 is 51116202.

It is not a de Polignac number, because 20261115 - 2¹ = 20261113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20261113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41020 + ... + 41510.

It is an arithmetic number, because the mean of its divisors is an integer number (844272).

Almost surely, 2^20261115 is an apocalyptic number.

20261115 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20261115 is a wasteful number, since it uses less digits than its factorization.

20261115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 20261115 is about 4501.2348305770. The cubic root of 20261115 is about 272.6179496684.

Adding to 20261115 its reverse (51116202), we get a palindrome (71377317).

The spelling of 20261115 in words is "twenty million, two hundred sixty-one thousand, one hundred fifteen".