20110313261 has 2 divisors, whose sum is σ = 20110313262. Its totient is φ = 20110313260.

The previous prime is 20110313213. The next prime is 20110313309. The reversal of 20110313261 is 16231301102.

It is a balanced prime because it is at equal distance from previous prime (20110313213) and next prime (20110313309).

It can be written as a sum of positive squares in only one way, i.e., 18667756900 + 1442556361 = 136630^2 + 37981^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110313261 - 2²² = 20106118957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110303261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055156630 + 10055156631.

It is an arithmetic number, because the mean of its divisors is an integer number (10055156631).

Almost surely, 2^20110313261 is an apocalyptic number.

It is an amenable number.

20110313261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110313261 is an equidigital number, since it uses as much as digits as its factorization.

20110313261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20110313261 its reverse (16231301102), we get a palindrome (36341614363).

The spelling of 20110313261 in words is "twenty billion, one hundred ten million, three hundred thirteen thousand, two hundred sixty-one".