20138084 has 6 divisors (see below), whose sum is σ = 35241654. Its totient is φ = 10069040.

The previous prime is 20138071. The next prime is 20138089. The reversal of 20138084 is 48083102.

It can be written as a sum of positive squares in only one way, i.e., 15429184 + 4708900 = 3928^2 + 2170^2 .

It is not an unprimeable number, because it can be changed into a prime (20138089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2517257 + ... + 2517264.

It is an arithmetic number, because the mean of its divisors is an integer number (5873609).

Almost surely, 2^20138084 is an apocalyptic number.

It is an amenable number.

20138084 is a deficient number, since it is larger than the sum of its proper divisors (15103570).

20138084 is a wasteful number, since it uses less digits than its factorization.

20138084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034525 (or 5034523 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20138084 is about 4487.5476599140. The cubic root of 20138084 is about 272.0650255434.

The spelling of 20138084 in words is "twenty million, one hundred thirty-eight thousand, eighty-four".