20801138 has 8 divisors (see below), whose sum is σ = 31238832. Its totient is φ = 10388196.

The previous prime is 20801117. The next prime is 20801167. The reversal of 20801138 is 83110802.

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, 3920 + ... + 7547.

It is an arithmetic number, because the mean of its divisors is an integer number (3904854).

Almost surely, 2^20801138 is an apocalyptic number.

20801138 is a deficient number, since it is larger than the sum of its proper divisors (10437694).

20801138 is a wasteful number, since it uses less digits than its factorization.

20801138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12376.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 20801138 is about 4560.8264601934. The cubic root of 20801138 is about 275.0187887989.

The spelling of 20801138 in words is "twenty million, eight hundred one thousand, one hundred thirty-eight".