20269952565 has 16 divisors (see below), whose sum is σ = 32434347456. Its totient is φ = 10809833600.

The previous prime is 20269952561. The next prime is 20269952579. The reversal of 20269952565 is 56525996202.

It is not a de Polignac number, because 20269952565 - 2² = 20269952561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20269952561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195670 + ... + 280760.

It is an arithmetic number, because the mean of its divisors is an integer number (2027146716).

Almost surely, 2^20269952565 is an apocalyptic number.

It is an amenable number.

20269952565 is a deficient number, since it is larger than the sum of its proper divisors (12164394891).

20269952565 is a wasteful number, since it uses less digits than its factorization.

20269952565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100980.

The product of its (nonzero) digits is 2916000, while the sum is 51.

The spelling of 20269952565 in words is "twenty billion, two hundred sixty-nine million, nine hundred fifty-two thousand, five hundred sixty-five".