20164099 has 6 divisors (see below), whose sum is σ = 20503860. Its totient is φ = 19829880.

The previous prime is 20164093. The next prime is 20164117. The reversal of 20164099 is 99046102.

It is a happy number.

It is not a de Polignac number, because 20164099 - 2²¹ = 18066947 is a prime.

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 20164099.

It is not an unprimeable number, because it can be changed into a prime (20164093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1012 + ... + 6430.

It is an arithmetic number, because the mean of its divisors is an integer number (3417310).

Almost surely, 2^20164099 is an apocalyptic number.

20164099 is a deficient number, since it is larger than the sum of its proper divisors (339761).

20164099 is an frugal number, since it uses more digits than its factorization.

20164099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5541 (or 5480 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20164099 is about 4490.4453008583. The cubic root of 20164099 is about 272.1821291378.

The spelling of 20164099 in words is "twenty million, one hundred sixty-four thousand, ninety-nine".