20239724 has 24 divisors (see below), whose sum is σ = 39136608. Its totient is φ = 9109760.

The previous prime is 20239699. The next prime is 20239727. The reversal of 20239724 is 42793202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20239727) 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 7 ways as a sum of consecutive naturals, for example, 4907 + ... + 8034.

It is an arithmetic number, because the mean of its divisors is an integer number (1630692).

Almost surely, 2^20239724 is an apocalyptic number.

It is an amenable number.

20239724 is a deficient number, since it is larger than the sum of its proper divisors (18896884).

20239724 is a wasteful number, since it uses less digits than its factorization.

20239724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12985 (or 12983 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20239724 is about 4498.8580773347. The cubic root of 20239724 is about 272.5219756146.

The spelling of 20239724 in words is "twenty million, two hundred thirty-nine thousand, seven hundred twenty-four".