20378506 has 8 divisors (see below), whose sum is σ = 31896864. Its totient is φ = 9746220.

The previous prime is 20378497. The next prime is 20378513. The reversal of 20378506 is 60587302.

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

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, 221460 + ... + 221551.

It is an arithmetic number, because the mean of its divisors is an integer number (3987108).

Almost surely, 2^20378506 is an apocalyptic number.

20378506 is a deficient number, since it is larger than the sum of its proper divisors (11518358).

20378506 is a wasteful number, since it uses less digits than its factorization.

20378506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443036.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20378506 is about 4514.2558633733. The cubic root of 20378506 is about 273.1434436941.

The spelling of 20378506 in words is "twenty million, three hundred seventy-eight thousand, five hundred six".