20723125 has 20 divisors (see below), whose sum is σ = 26316576. Its totient is φ = 16310000.

The previous prime is 20723113. The next prime is 20723137. The reversal of 20723125 is 52132702.

It is an interprime number because it is at equal distance from previous prime (20723113) and next prime (20723137).

It is not a de Polignac number, because 20723125 - 2¹³ = 20714933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20723096 and 20723105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44142 + ... + 44608.

Almost surely, 2^20723125 is an apocalyptic number.

20723125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20723125 is a deficient number, since it is larger than the sum of its proper divisors (5593451).

20723125 is an frugal number, since it uses more digits than its factorization.

20723125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20723125 is about 4552.2659192978. The cubic root of 20723125 is about 274.6745461169.

Adding to 20723125 its reverse (52132702), we get a palindrome (72855827).

It can be divided in two parts, 207 and 23125, that added together give a palindrome (23332).

The spelling of 20723125 in words is "twenty million, seven hundred twenty-three thousand, one hundred twenty-five".