20744030 has 16 divisors (see below), whose sum is σ = 37433664. Its totient is φ = 8276640.

The previous prime is 20744023. The next prime is 20744039. The reversal of 20744030 is 3044702.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20743993 and 20744011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20744039) 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, 1904 + ... + 6716.

It is an arithmetic number, because the mean of its divisors is an integer number (2339604).

Almost surely, 2^20744030 is an apocalyptic number.

20744030 is a deficient number, since it is larger than the sum of its proper divisors (16689634).

20744030 is a wasteful number, since it uses less digits than its factorization.

20744030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20744030 is about 4554.5614497995. The cubic root of 20744030 is about 274.7668768127.

Adding to 20744030 its product of nonzero digits (672), we get a palindrome (20744702).

Adding to 20744030 its reverse (3044702), we get a palindrome (23788732).

The spelling of 20744030 in words is "twenty million, seven hundred forty-four thousand, thirty".