20378684 has 12 divisors (see below), whose sum is σ = 35700000. Its totient is φ = 10178688.

The previous prime is 20378663. The next prime is 20378707. The reversal of 20378684 is 48687302.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2957 + ... + 7035.

It is an arithmetic number, because the mean of its divisors is an integer number (2975000).

Almost surely, 2^20378684 is an apocalyptic number.

It is an amenable number.

20378684 is a deficient number, since it is larger than the sum of its proper divisors (15321316).

20378684 is a wasteful number, since it uses less digits than its factorization.

20378684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332 (or 5330 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 20378684 is about 4514.2755786505. The cubic root of 20378684 is about 273.1442389665.

It can be divided in two parts, 203 and 78684, that added together give a palindrome (78887).

The spelling of 20378684 in words is "twenty million, three hundred seventy-eight thousand, six hundred eighty-four".