20344874 has 16 divisors (see below), whose sum is σ = 33536160. Its totient is φ = 9179760.

The previous prime is 20344871. The next prime is 20344879. The reversal of 20344874 is 47844302.

It is a self number, because there is not a number n which added to its sum of digits gives 20344874.

It is not an unprimeable number, because it can be changed into a prime (20344871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269 + ... + 6384.

It is an arithmetic number, because the mean of its divisors is an integer number (2096010).

Almost surely, 2^20344874 is an apocalyptic number.

20344874 is a deficient number, since it is larger than the sum of its proper divisors (13191286).

20344874 is a wasteful number, since it uses less digits than its factorization.

20344874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6805.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 20344874 is about 4510.5292372403. The cubic root of 20344874 is about 272.9930987087.

The spelling of 20344874 in words is "twenty million, three hundred forty-four thousand, eight hundred seventy-four".