20873093 has 4 divisors (see below), whose sum is σ = 22100940. Its totient is φ = 19645248.

The previous prime is 20873087. The next prime is 20873107. The reversal of 20873093 is 39037802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39037802 = 2 ⋅19518901.

It can be written as a sum of positive squares in 2 ways, for example, as 5678689 + 15194404 = 2383^2 + 3898^2 .

It is a cyclic number.

It is not a de Polignac number, because 20873093 - 2¹² = 20868997 is a prime.

It is a super-2 number, since 2×20873093² = 871372022773298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20873003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613898 + ... + 613931.

It is an arithmetic number, because the mean of its divisors is an integer number (5525235).

Almost surely, 2^20873093 is an apocalyptic number.

It is an amenable number.

20873093 is a deficient number, since it is larger than the sum of its proper divisors (1227847).

20873093 is a wasteful number, since it uses less digits than its factorization.

20873093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227846.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20873093 is about 4568.7080230630. The cubic root of 20873093 is about 275.3355375393.

The spelling of 20873093 in words is "twenty million, eight hundred seventy-three thousand, ninety-three".