20734084 has 48 divisors (see below), whose sum is σ = 44972928. Its totient is φ = 8160768.

The previous prime is 20734081. The next prime is 20734099. The reversal of 20734084 is 48043702.

20734084 = 357² + 358² + ... + 475².

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (20734081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19962 + ... + 20974.

It is an arithmetic number, because the mean of its divisors is an integer number (936936).

Almost surely, 2^20734084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20734084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22486464).

20734084 is an abundant number, since it is smaller than the sum of its proper divisors (24238844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20734084 is a wasteful number, since it uses less digits than its factorization.

20734084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20734084 is about 4553.4694464770. The cubic root of 20734084 is about 274.7229562528.

Adding to 20734084 its reverse (48043702), we get a palindrome (68777786).

The spelling of 20734084 in words is "twenty million, seven hundred thirty-four thousand, eighty-four".