It is a self number, because there is not a number n which added to its sum of digits gives 21164034.
It is an unprimeable number.
Almost surely, 221164034 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21164034 is a wasteful number, since it uses less digits than its factorization.
21164034 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 25889.
The square root of 21164034 is about 4600.4384573647. The cubic root of 21164034 is about 276.6089003765.
The spelling of 21164034 in words is "twenty-one million, one hundred sixty-four thousand, thirty-four".