20002842565 has 16 divisors (see below), whose sum is σ = 24752153088. Its totient is φ = 15509725056.

The previous prime is 20002842557. The next prime is 20002842589. The reversal of 20002842565 is 56524820002.

It is a cyclic number.

It is not a de Polignac number, because 20002842565 - 2³ = 20002842557 is a prime.

It is a super-2 number, since 2×20002842565² (a number of 21 digits) contains 22 as substring.

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 20002842565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388992 + ... + 437401.

It is an arithmetic number, because the mean of its divisors is an integer number (1547009568).

Almost surely, 2^20002842565 is an apocalyptic number.

It is an amenable number.

20002842565 is a deficient number, since it is larger than the sum of its proper divisors (4749310523).

20002842565 is a wasteful number, since it uses less digits than its factorization.

20002842565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826548.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 20002842565 in words is "twenty billion, two million, eight hundred forty-two thousand, five hundred sixty-five".