20165353901 has 16 divisors (see below), whose sum is σ = 25676144640. Its totient is φ = 15378935280.

The previous prime is 20165353889. The next prime is 20165353909. The reversal of 20165353901 is 10935356102.

It is a cyclic number.

It is not a de Polignac number, because 20165353901 - 2³⁴ = 2985484717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165353909) 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, 2782421 + ... + 2789658.

It is an arithmetic number, because the mean of its divisors is an integer number (1604759040).

Almost surely, 2^20165353901 is an apocalyptic number.

It is an amenable number.

20165353901 is a deficient number, since it is larger than the sum of its proper divisors (5510790739).

20165353901 is a wasteful number, since it uses less digits than its factorization.

20165353901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572144.

The product of its (nonzero) digits is 24300, while the sum is 35.

The spelling of 20165353901 in words is "twenty billion, one hundred sixty-five million, three hundred fifty-three thousand, nine hundred one".