20164249 has 4 divisors (see below), whose sum is σ = 23044864. Its totient is φ = 17283636.

The previous prime is 20164247. The next prime is 20164259. The reversal of 20164249 is 94246102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94246102 = 2 ⋅47123051.

It is a cyclic number.

It is not a de Polignac number, because 20164249 - 2¹ = 20164247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20164247) 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, 1440297 + ... + 1440310.

It is an arithmetic number, because the mean of its divisors is an integer number (5761216).

Almost surely, 2^20164249 is an apocalyptic number.

It is an amenable number.

20164249 is a deficient number, since it is larger than the sum of its proper divisors (2880615).

20164249 is an equidigital number, since it uses as much as digits as its factorization.

20164249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880614.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20164249 is about 4490.4620029569. The cubic root of 20164249 is about 272.1828040538.

The spelling of 20164249 in words is "twenty million, one hundred sixty-four thousand, two hundred forty-nine".