20873673 has 16 divisors (see below), whose sum is σ = 32269440. Its totient is φ = 13310352.

The previous prime is 20873663. The next prime is 20873681. The reversal of 20873673 is 37637802.

It is not a de Polignac number, because 20873673 - 2¹⁸ = 20611529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20873623) 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, 16186 + ... + 17427.

It is an arithmetic number, because the mean of its divisors is an integer number (2016840).

Almost surely, 2^20873673 is an apocalyptic number.

20873673 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20873673 is a deficient number, since it is larger than the sum of its proper divisors (11395767).

20873673 is a wasteful number, since it uses less digits than its factorization.

20873673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33645 (or 33639 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20873673 is about 4568.7714978974. The cubic root of 20873673 is about 275.3380877624.

The spelling of 20873673 in words is "twenty million, eight hundred seventy-three thousand, six hundred seventy-three".