21167082 has 40 divisors (see below), whose sum is σ = 47746116. Its totient is φ = 7008768.

The previous prime is 21167077. The next prime is 21167093. The reversal of 21167082 is 28076112.

It can be written as a sum of positive squares in 2 ways, for example, as 20169081 + 998001 = 4491^2 + 999^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30928 + ... + 31604.

Almost surely, 2^21167082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21167082, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23873058).

21167082 is an abundant number, since it is smaller than the sum of its proper divisors (26579034).

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

21167082 is a wasteful number, since it uses less digits than its factorization.

21167082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 21167082 is about 4600.7697182102. The cubic root of 21167082 is about 276.6221786179.

The spelling of 21167082 in words is "twenty-one million, one hundred sixty-seven thousand, eighty-two".