20154226565 has 16 divisors (see below), whose sum is σ = 26399169216. Its totient is φ = 14649033600.

The previous prime is 20154226501. The next prime is 20154226579. The reversal of 20154226565 is 56562245102.

It is a happy number.

It is not a de Polignac number, because 20154226565 - 2⁶ = 20154226501 is a prime.

It is a Duffinian number.

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, 11807 + ... + 201116.

It is an arithmetic number, because the mean of its divisors is an integer number (1649948076).

Almost surely, 2^20154226565 is an apocalyptic number.

It is an amenable number.

20154226565 is a deficient number, since it is larger than the sum of its proper divisors (6244942651).

20154226565 is a wasteful number, since it uses less digits than its factorization.

20154226565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214660.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 20154226565 in words is "twenty billion, one hundred fifty-four million, two hundred twenty-six thousand, five hundred sixty-five".