21167104 has 44 divisors (see below), whose sum is σ = 48374704. Its totient is φ = 9068544.

The previous prime is 21167101. The next prime is 21167117. The reversal of 21167104 is 40176112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21167101) 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, 5692 + ... + 8644.

Almost surely, 2^21167104 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 21167104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24187352).

21167104 is an abundant number, since it is smaller than the sum of its proper divisors (27207600).

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

21167104 is an equidigital number, since it uses as much as digits as its factorization.

21167104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980 (or 2962 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 21167104 is about 4600.7721091139. The cubic root of 21167104 is about 276.6222744536.

The spelling of 21167104 in words is "twenty-one million, one hundred sixty-seven thousand, one hundred four".