20457884 has 6 divisors (see below), whose sum is σ = 35801304. Its totient is φ = 10228940.

The previous prime is 20457863. The next prime is 20457901. The reversal of 20457884 is 48875402.

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 as a sum of consecutive naturals, namely, 2557232 + ... + 2557239.

It is an arithmetic number, because the mean of its divisors is an integer number (5966884).

Almost surely, 2^20457884 is an apocalyptic number.

It is an amenable number.

20457884 is a deficient number, since it is larger than the sum of its proper divisors (15343420).

20457884 is a wasteful number, since it uses less digits than its factorization.

20457884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114475 (or 5114473 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 20457884 is about 4523.0392436944. The cubic root of 20457884 is about 273.4976320694.

The spelling of 20457884 in words is "twenty million, four hundred fifty-seven thousand, eight hundred eighty-four".