20387854 has 8 divisors (see below), whose sum is σ = 30615120. Its totient is φ = 10182816.

The previous prime is 20387849. The next prime is 20387897. The reversal of 20387854 is 45878302.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3034 + ... + 7069.

It is an arithmetic number, because the mean of its divisors is an integer number (3826890).

Almost surely, 2^20387854 is an apocalyptic number.

20387854 is a deficient number, since it is larger than the sum of its proper divisors (10227266).

20387854 is a wasteful number, since it uses less digits than its factorization.

20387854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11114.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 20387854 is about 4515.2911312561. The cubic root of 20387854 is about 273.1852026367.

The spelling of 20387854 in words is "twenty million, three hundred eighty-seven thousand, eight hundred fifty-four".