20002378 has 32 divisors (see below), whose sum is σ = 34191360. Its totient is φ = 8694000.

The previous prime is 20002369. The next prime is 20002397. The reversal of 20002378 is 87320002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 15 ways as a sum of consecutive naturals, for example, 94693 + ... + 94903.

It is an arithmetic number, because the mean of its divisors is an integer number (1068480).

Almost surely, 2^20002378 is an apocalyptic number.

20002378 is a deficient number, since it is larger than the sum of its proper divisors (14188982).

20002378 is a wasteful number, since it uses less digits than its factorization.

20002378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20002378 is about 4472.4018155796. The cubic root of 20002378 is about 271.4525193750.

The spelling of 20002378 in words is "twenty million, two thousand, three hundred seventy-eight".