20011512165 has 32 divisors (see below), whose sum is σ = 32210583552. Its totient is φ = 10608840000.

The previous prime is 20011512133. The next prime is 20011512173. The reversal of 20011512165 is 56121511002.

It is not a de Polignac number, because 20011512165 - 2⁵ = 20011512133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6734130 + ... + 6737100.

It is an arithmetic number, because the mean of its divisors is an integer number (1006580736).

Almost surely, 2^20011512165 is an apocalyptic number.

It is an amenable number.

20011512165 is a deficient number, since it is larger than the sum of its proper divisors (12199071387).

20011512165 is a wasteful number, since it uses less digits than its factorization.

20011512165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5521.

The product of its (nonzero) digits is 600, while the sum is 24.

The spelling of 20011512165 in words is "twenty billion, eleven million, five hundred twelve thousand, one hundred sixty-five".