20442511165 has 16 divisors (see below), whose sum is σ = 24650500608. Its totient is φ = 16274477056.

The previous prime is 20442511139. The next prime is 20442511207. The reversal of 20442511165 is 56111524402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20442511165 - 2¹¹ = 20442509117 is a prime.

It is a super-2 number, since 2×20442511165² (a number of 21 digits) contains 22 as substring.

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, 1410144 + ... + 1424566.

It is an arithmetic number, because the mean of its divisors is an integer number (1540656288).

Almost surely, 2^20442511165 is an apocalyptic number.

It is an amenable number.

20442511165 is a deficient number, since it is larger than the sum of its proper divisors (4207989443).

20442511165 is a wasteful number, since it uses less digits than its factorization.

20442511165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15788.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 20442511165 in words is "twenty billion, four hundred forty-two million, five hundred eleven thousand, one hundred sixty-five".