21066034 has 8 divisors (see below), whose sum is σ = 34471728. Its totient is φ = 9575460.

The previous prime is 21066013. The next prime is 21066049. The reversal of 21066034 is 43066012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 957547 = 21066034 / (2 + 1 + 0 + 6 + 6 + 0 + 3 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 21065996 and 21066014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478752 + ... + 478795.

It is an arithmetic number, because the mean of its divisors is an integer number (4308966).

Almost surely, 2^21066034 is an apocalyptic number.

21066034 is a deficient number, since it is larger than the sum of its proper divisors (13405694).

21066034 is a wasteful number, since it uses less digits than its factorization.

21066034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957560.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 21066034 is about 4589.7749400161. The cubic root of 21066034 is about 276.1812941071.

Subtracting from 21066034 its sum of digits (22), we obtain a palindrome (21066012).

The spelling of 21066034 in words is "twenty-one million, sixty-six thousand, thirty-four".