21734082 has 20 divisors (see below), whose sum is σ = 48700806. Its totient is φ = 7244640.

The previous prime is 21734077. The next prime is 21734099. The reversal of 21734082 is 28043712.

It can be written as a sum of positive squares in only one way, i.e., 20169081 + 1565001 = 4491^2 + 1251^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 66919 + ... + 67242.

Almost surely, 2^21734082 is an apocalyptic number.

21734082 is an abundant number, since it is smaller than the sum of its proper divisors (26966724).

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

21734082 is a wasteful number, since it uses less digits than its factorization.

21734082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134175 (or 134166 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 21734082 is about 4661.9826254502. The cubic root of 21734082 is about 279.0703950015.

Adding to 21734082 its reverse (28043712), we get a palindrome (49777794).

The spelling of 21734082 in words is "twenty-one million, seven hundred thirty-four thousand, eighty-two".