20347164 has 36 divisors (see below), whose sum is σ = 54460224. Its totient is φ = 6383232.

The previous prime is 20347121. The next prime is 20347169. The reversal of 20347164 is 46174302.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20347169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16012 + ... + 17235.

It is an arithmetic number, because the mean of its divisors is an integer number (1512784).

Almost surely, 2^20347164 is an apocalyptic number.

It is an amenable number.

20347164 is an abundant number, since it is smaller than the sum of its proper divisors (34113060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20347164 is a wasteful number, since it uses less digits than its factorization.

20347164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33274 (or 33269 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20347164 is about 4510.7830805748. The cubic root of 20347164 is about 273.0033409405.

The spelling of 20347164 in words is "twenty million, three hundred forty-seven thousand, one hundred sixty-four".