20164443 has 16 divisors (see below), whose sum is σ = 29116416. Its totient is φ = 12339360.

The previous prime is 20164439. The next prime is 20164451. The reversal of 20164443 is 34446102.

It is not a de Polignac number, because 20164443 - 2² = 20164439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20164423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6096 + ... + 8802.

It is an arithmetic number, because the mean of its divisors is an integer number (1819776).

Almost surely, 2^20164443 is an apocalyptic number.

20164443 is a deficient number, since it is larger than the sum of its proper divisors (8951973).

20164443 is a wasteful number, since it uses less digits than its factorization.

20164443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2914.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20164443 is about 4490.4836042458. The cubic root of 20164443 is about 272.1836769402.

The spelling of 20164443 in words is "twenty million, one hundred sixty-four thousand, four hundred forty-three".