20272501261 has 8 divisors (see below), whose sum is σ = 20317639320. Its totient is φ = 20227395648.

The previous prime is 20272501237. The next prime is 20272501267. The reversal of 20272501261 is 16210527202.

It can be written as a sum of positive squares in 4 ways, for example, as 152100 + 20272349161 = 390^2 + 142381^2 .

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 20272501261 - 2⁵ = 20272501229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20272501267) 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, 1573795 + ... + 1586623.

It is an arithmetic number, because the mean of its divisors is an integer number (2539704915).

Almost surely, 2^20272501261 is an apocalyptic number.

It is an amenable number.

20272501261 is a deficient number, since it is larger than the sum of its proper divisors (45138059).

20272501261 is a wasteful number, since it uses less digits than its factorization.

20272501261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16223.

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 20272501261 in words is "twenty billion, two hundred seventy-two million, five hundred one thousand, two hundred sixty-one".