20387894 has 8 divisors (see below), whose sum is σ = 31568448. Its totient is φ = 9865080.

The previous prime is 20387849. The next prime is 20387897. The reversal of 20387894 is 49878302.

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 (20387897) 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, 164357 + ... + 164480.

It is an arithmetic number, because the mean of its divisors is an integer number (3946056).

Almost surely, 2^20387894 is an apocalyptic number.

20387894 is a deficient number, since it is larger than the sum of its proper divisors (11180554).

20387894 is a wasteful number, since it uses less digits than its factorization.

20387894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328870.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 20387894 is about 4515.2955606472. The cubic root of 20387894 is about 273.1853812954.

The spelling of 20387894 in words is "twenty million, three hundred eighty-seven thousand, eight hundred ninety-four".