20164407 has 4 divisors (see below), whose sum is σ = 26885880. Its totient is φ = 13442936.

The previous prime is 20164393. The next prime is 20164409. The reversal of 20164407 is 70446102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20164407 - 2²² = 15970103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3360732 + ... + 3360737.

It is an arithmetic number, because the mean of its divisors is an integer number (6721470).

Almost surely, 2^20164407 is an apocalyptic number.

20164407 is a deficient number, since it is larger than the sum of its proper divisors (6721473).

20164407 is an equidigital number, since it uses as much as digits as its factorization.

20164407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721472.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20164407 is about 4490.4795957670. The cubic root of 20164407 is about 272.1835149617.

The spelling of 20164407 in words is "twenty million, one hundred sixty-four thousand, four hundred seven".