20903894 has 8 divisors (see below), whose sum is σ = 34206408. Its totient is φ = 9501760.

The previous prime is 20903893. The next prime is 20903899. The reversal of 20903894 is 49830902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20903893) 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, 475067 + ... + 475110.

It is an arithmetic number, because the mean of its divisors is an integer number (4275801).

Almost surely, 2^20903894 is an apocalyptic number.

20903894 is a deficient number, since it is larger than the sum of its proper divisors (13302514).

20903894 is a wasteful number, since it uses less digits than its factorization.

20903894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950190.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 20903894 is about 4572.0776458849. The cubic root of 20903894 is about 275.4709022708.

The spelling of 20903894 in words is "twenty million, nine hundred three thousand, eight hundred ninety-four".