20725873 has 24 divisors (see below), whose sum is σ = 25855200. Its totient is φ = 16507008.

The previous prime is 20725867. The next prime is 20725889. The reversal of 20725873 is 37852702.

It is not a de Polignac number, because 20725873 - 2⁹ = 20725361 is a prime.

It is a super-2 number, since 2×20725873² = 859123623224258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20725813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115698 + ... + 115876.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^20725873 is an apocalyptic number.

It is an amenable number.

20725873 is a deficient number, since it is larger than the sum of its proper divisors (5129327).

20725873 is a wasteful number, since it uses less digits than its factorization.

20725873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 20725873 is about 4552.5677370029. The cubic root of 20725873 is about 274.6866866973.

The spelling of 20725873 in words is "twenty million, seven hundred twenty-five thousand, eight hundred seventy-three".