20164345 has 8 divisors (see below), whose sum is σ = 24374664. Its totient is φ = 16013184.

The previous prime is 20164321. The next prime is 20164349. The reversal of 20164345 is 54346102.

It can be written as a sum of positive squares in 4 ways, for example, as 7907344 + 12257001 = 2812^2 + 3501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20164345 - 2¹¹ = 20162297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20164349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14034 + ... + 15403.

It is an arithmetic number, because the mean of its divisors is an integer number (3046833).

Almost surely, 2^20164345 is an apocalyptic number.

It is an amenable number.

20164345 is a deficient number, since it is larger than the sum of its proper divisors (4210319).

20164345 is a wasteful number, since it uses less digits than its factorization.

20164345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29579.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20164345 is about 4490.4726922675. The cubic root of 20164345 is about 272.1832359983.

It can be divided in two parts, 201 and 64345, that added together give a palindrome (64546).

The spelling of 20164345 in words is "twenty million, one hundred sixty-four thousand, three hundred forty-five".