20143724 has 24 divisors (see below), whose sum is σ = 37416960. Its totient is φ = 9462096.

The previous prime is 20143709. The next prime is 20143727. The reversal of 20143724 is 42734102.

It is a self number, because there is not a number n which added to its sum of digits gives 20143724.

It is not an unprimeable number, because it can be changed into a prime (20143727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8609 + ... + 10695.

It is an arithmetic number, because the mean of its divisors is an integer number (1559040).

Almost surely, 2^20143724 is an apocalyptic number.

It is an amenable number.

20143724 is a deficient number, since it is larger than the sum of its proper divisors (17273236).

20143724 is a wasteful number, since it uses less digits than its factorization.

20143724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2235 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20143724 is about 4488.1760215036. The cubic root of 20143724 is about 272.0904219270.

Adding to 20143724 its reverse (42734102), we get a palindrome (62877826).

The spelling of 20143724 in words is "twenty million, one hundred forty-three thousand, seven hundred twenty-four".