20164347 has 24 divisors (see below), whose sum is σ = 33627360. Its totient is φ = 11404800.

The previous prime is 20164321. The next prime is 20164349. The reversal of 20164347 is 74346102.

It is not a de Polignac number, because 20164347 - 2⁶ = 20164283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20164347.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4779 + ... + 7947.

It is an arithmetic number, because the mean of its divisors is an integer number (1401140).

Almost surely, 2^20164347 is an apocalyptic number.

20164347 is a deficient number, since it is larger than the sum of its proper divisors (13463013).

20164347 is a wasteful number, since it uses less digits than its factorization.

20164347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283 (or 3280 counting only the distinct ones).

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

The square root of 20164347 is about 4490.4729149612. The cubic root of 20164347 is about 272.1832449971.

The spelling of 20164347 in words is "twenty million, one hundred sixty-four thousand, three hundred forty-seven".