20740799 has 16 divisors (see below), whose sum is σ = 23320800. Its totient is φ = 18330624.

The previous prime is 20740789. The next prime is 20740823. The reversal of 20740799 is 99704702.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20740799 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 (20740729) 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 15 ways as a sum of consecutive naturals, for example, 50507 + ... + 50915.

It is an arithmetic number, because the mean of its divisors is an integer number (1457550).

Almost surely, 2^20740799 is an apocalyptic number.

20740799 is a deficient number, since it is larger than the sum of its proper divisors (2580001).

20740799 is a wasteful number, since it uses less digits than its factorization.

20740799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 20740799 is about 4554.2067366337. The cubic root of 20740799 is about 274.7526105736.

The spelling of 20740799 in words is "twenty million, seven hundred forty thousand, seven hundred ninety-nine".