20344999 has 4 divisors (see below), whose sum is σ = 20357064. Its totient is φ = 20332936.

The previous prime is 20344997. The next prime is 20345009. The reversal of 20344999 is 99944302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20344999 - 2¹ = 20344997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344993) 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 3 ways as a sum of consecutive naturals, for example, 2992 + ... + 7045.

It is an arithmetic number, because the mean of its divisors is an integer number (5089266).

Almost surely, 2^20344999 is an apocalyptic number.

20344999 is a deficient number, since it is larger than the sum of its proper divisors (12065).

20344999 is a wasteful number, since it uses less digits than its factorization.

20344999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12064.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 20344999 is about 4510.5430936862. The cubic root of 20344999 is about 272.9936578024.

The spelling of 20344999 in words is "twenty million, three hundred forty-four thousand, nine hundred ninety-nine".