20873394 has 12 divisors (see below), whose sum is σ = 45225726. Its totient is φ = 6957792.

The previous prime is 20873393. The next prime is 20873423. The reversal of 20873394 is 49337802.

It can be written as a sum of positive squares in only one way, i.e., 19580625 + 1292769 = 4425^2 + 1137^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20873393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 579799 + ... + 579834.

Almost surely, 2^20873394 is an apocalyptic number.

20873394 is an abundant number, since it is smaller than the sum of its proper divisors (24352332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20873394 is a wasteful number, since it uses less digits than its factorization.

20873394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159641 (or 1159638 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 20873394 is about 4568.7409644233. The cubic root of 20873394 is about 275.3368610231.

The spelling of 20873394 in words is "twenty million, eight hundred seventy-three thousand, three hundred ninety-four".