20623873 has 16 divisors (see below), whose sum is σ = 23353920. Its totient is φ = 18095616.

The previous prime is 20623871. The next prime is 20623877. The reversal of 20623873 is 37832602.

It is not a de Polignac number, because 20623873 - 2¹ = 20623871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20623871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21165 + ... + 22117.

It is an arithmetic number, because the mean of its divisors is an integer number (1459620).

Almost surely, 2^20623873 is an apocalyptic number.

It is an amenable number.

20623873 is a deficient number, since it is larger than the sum of its proper divisors (2730047).

20623873 is a wasteful number, since it uses less digits than its factorization.

20623873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20623873 is about 4541.3514508349. The cubic root of 20623873 is about 274.2353324785.

The spelling of 20623873 in words is "twenty million, six hundred twenty-three thousand, eight hundred seventy-three".