21034046 has 16 divisors (see below), whose sum is σ = 34728048. Its totient is φ = 9475200.

The previous prime is 21034043. The next prime is 21034061. The reversal of 21034046 is 64043012.

It is a happy number.

It is a super-2 number, since 2×21034046² = 884862182260232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1745 + ... + 6716.

It is an arithmetic number, because the mean of its divisors is an integer number (2170503).

Almost surely, 2^21034046 is an apocalyptic number.

21034046 is a deficient number, since it is larger than the sum of its proper divisors (13694002).

21034046 is a wasteful number, since it uses less digits than its factorization.

21034046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8587.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 21034046 is about 4586.2889137079. The cubic root of 21034046 is about 276.0414329032.

Adding to 21034046 its reverse (64043012), we get a palindrome (85077058).

The spelling of 21034046 in words is "twenty-one million, thirty-four thousand, forty-six".