20261162611 has 8 divisors (see below), whose sum is σ = 20657467584. Its totient is φ = 19865376960.

The previous prime is 20261162569. The next prime is 20261162653. The reversal of 20261162611 is 11626116202.

It is an interprime number because it is at equal distance from previous prime (20261162569) and next prime (20261162653).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20261162611 - 2⁹ = 20261162099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20261162611.

It is not an unprimeable number, because it can be changed into a prime (20261162681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50571 + ... + 207556.

It is an arithmetic number, because the mean of its divisors is an integer number (2582183448).

Almost surely, 2^20261162611 is an apocalyptic number.

20261162611 is a deficient number, since it is larger than the sum of its proper divisors (396304973).

20261162611 is a wasteful number, since it uses less digits than its factorization.

20261162611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259661.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 20261162611 its reverse (11626116202), we get a palindrome (31887278813).

The spelling of 20261162611 in words is "twenty billion, two hundred sixty-one million, one hundred sixty-two thousand, six hundred eleven".