20723044 has 6 divisors (see below), whose sum is σ = 36265334. Its totient is φ = 10361520.

The previous prime is 20723041. The next prime is 20723047. The reversal of 20723044 is 44032702.

It is an interprime number because it is at equal distance from previous prime (20723041) and next prime (20723047).

It can be written as a sum of positive squares in only one way, i.e., 20593444 + 129600 = 4538^2 + 360^2 .

It is not an unprimeable number, because it can be changed into a prime (20723041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590377 + ... + 2590384.

Almost surely, 2^20723044 is an apocalyptic number.

It is an amenable number.

20723044 is a deficient number, since it is larger than the sum of its proper divisors (15542290).

20723044 is a wasteful number, since it uses less digits than its factorization.

20723044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180765 (or 5180763 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20723044 is about 4552.2570226208. The cubic root of 20723044 is about 274.6741882451.

Adding to 20723044 its reverse (44032702), we get a palindrome (64755746).

The spelling of 20723044 in words is "twenty million, seven hundred twenty-three thousand, forty-four".