20628873 has 12 divisors (see below), whose sum is σ = 29837808. Its totient is φ = 13733880.

The previous prime is 20628859. The next prime is 20628887. The reversal of 20628873 is 37882602.

It is a happy number.

20628873 is a `hidden beast` number, since 20 + 628 + 8 + 7 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (20628859) and next prime (20628887).

It is not a de Polignac number, because 20628873 - 2⁶ = 20628809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20628823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9718 + ... + 11648.

It is an arithmetic number, because the mean of its divisors is an integer number (2486484).

Almost surely, 2^20628873 is an apocalyptic number.

It is an amenable number.

20628873 is a deficient number, since it is larger than the sum of its proper divisors (9208935).

20628873 is a wasteful number, since it uses less digits than its factorization.

20628873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124 (or 3121 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 20628873 is about 4541.9019143967. The cubic root of 20628873 is about 274.2574923297.

The spelling of 20628873 in words is "twenty million, six hundred twenty-eight thousand, eight hundred seventy-three".