20287894 has 16 divisors (see below), whose sum is σ = 33276096. Its totient is φ = 9200200.

The previous prime is 20287889. The next prime is 20287901. The reversal of 20287894 is 49878202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12129 + ... + 13699.

It is an arithmetic number, because the mean of its divisors is an integer number (2079756).

Almost surely, 2^20287894 is an apocalyptic number.

20287894 is a deficient number, since it is larger than the sum of its proper divisors (12988202).

20287894 is a wasteful number, since it uses less digits than its factorization.

20287894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 20287894 is about 4504.2084765250. The cubic root of 20287894 is about 272.7380026553.

The spelling of 20287894 in words is "twenty million, two hundred eighty-seven thousand, eight hundred ninety-four".