20079724 has 12 divisors (see below), whose sum is σ = 40159504. Its totient is φ = 8605584.

The previous prime is 20079721. The next prime is 20079743. The reversal of 20079724 is 42797002.

It is a happy number.

20079724 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20079721) 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 3 ways as a sum of consecutive naturals, for example, 358539 + ... + 358594.

Almost surely, 2^20079724 is an apocalyptic number.

It is an amenable number.

20079724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20079724 is a wasteful number, since it uses less digits than its factorization.

20079724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717144 (or 717142 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20079724 is about 4481.0405041686. The cubic root of 20079724 is about 271.8019571956.

The spelling of 20079724 in words is "twenty million, seventy-nine thousand, seven hundred twenty-four".