20740084 has 12 divisors (see below), whose sum is σ = 36628900. Its totient is φ = 10274688.

The previous prime is 20740079. The next prime is 20740087. The reversal of 20740084 is 48004702.

It can be written as a sum of positive squares in 2 ways, for example, as 12096484 + 8643600 = 3478^2 + 2940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23349 + ... + 24220.

Almost surely, 2^20740084 is an apocalyptic number.

It is an amenable number.

20740084 is a deficient number, since it is larger than the sum of its proper divisors (15888816).

20740084 is a wasteful number, since it uses less digits than its factorization.

20740084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47682 (or 47680 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20740084 is about 4554.1282371053. The cubic root of 20740084 is about 274.7494533443.

Adding to 20740084 its reverse (48004702), we get a palindrome (68744786).

The spelling of 20740084 in words is "twenty million, seven hundred forty thousand, eighty-four".