20253565261 has 16 divisors (see below), whose sum is σ = 21572179200. Its totient is φ = 18960480000.

The previous prime is 20253565231. The next prime is 20253565301. The reversal of 20253565261 is 16256535202.

It is not a de Polignac number, because 20253565261 - 2¹³ = 20253557069 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 20253565261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20253565201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4260636 + ... + 4265386.

It is an arithmetic number, because the mean of its divisors is an integer number (1348261200).

Almost surely, 2^20253565261 is an apocalyptic number.

It is an amenable number.

20253565261 is a deficient number, since it is larger than the sum of its proper divisors (1318613939).

20253565261 is a wasteful number, since it uses less digits than its factorization.

20253565261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7380.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 20253565261 in words is "twenty billion, two hundred fifty-three million, five hundred sixty-five thousand, two hundred sixty-one".