20201310261 has 12 divisors (see below), whose sum is σ = 31832367840. Its totient is φ = 12243218280.

The previous prime is 20201310253. The next prime is 20201310263. The reversal of 20201310261 is 16201310202.

It is not a de Polignac number, because 20201310261 - 2³ = 20201310253 is a prime.

It is a super-2 number, since 2×20201310261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201310263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102026721 + ... + 102026918.

It is an arithmetic number, because the mean of its divisors is an integer number (2652697320).

Almost surely, 2^20201310261 is an apocalyptic number.

It is an amenable number.

20201310261 is a deficient number, since it is larger than the sum of its proper divisors (11631057579).

20201310261 is a wasteful number, since it uses less digits than its factorization.

20201310261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204053656 (or 204053653 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20201310261 its reverse (16201310202), we get a palindrome (36402620463).

The spelling of 20201310261 in words is "twenty billion, two hundred one million, three hundred ten thousand, two hundred sixty-one".