20893404 has 36 divisors (see below), whose sum is σ = 56712264. Its totient is φ = 5969376.

The previous prime is 20893393. The next prime is 20893423. The reversal of 20893404 is 40439802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17179 + ... + 18354.

Almost surely, 2^20893404 is an apocalyptic number.

It is an amenable number.

20893404 is an abundant number, since it is smaller than the sum of its proper divisors (35818860).

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

20893404 is a wasteful number, since it uses less digits than its factorization.

20893404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35554 (or 35545 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20893404 is about 4570.9303210616. The cubic root of 20893404 is about 275.4248155901.

The spelling of 20893404 in words is "twenty million, eight hundred ninety-three thousand, four hundred four".