20164406 has 4 divisors (see below), whose sum is σ = 30246612. Its totient is φ = 10082202.

The previous prime is 20164393. The next prime is 20164409. The reversal of 20164406 is 60446102.

It is a happy number.

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

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 as a sum of consecutive naturals, namely, 5041100 + ... + 5041103.

It is an arithmetic number, because the mean of its divisors is an integer number (7561653).

Almost surely, 2^20164406 is an apocalyptic number.

20164406 is a deficient number, since it is larger than the sum of its proper divisors (10082206).

20164406 is a wasteful number, since it uses less digits than its factorization.

20164406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10082205.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20164406 is about 4490.4794844203. The cubic root of 20164406 is about 272.1835104623.

The spelling of 20164406 in words is "twenty million, one hundred sixty-four thousand, four hundred six".