21033046 has 8 divisors (see below), whose sum is σ = 33405480. Its totient is φ = 9897888.

The previous prime is 21033011. The next prime is 21033053. The reversal of 21033046 is 64033012.

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

It is a congruent number.

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, 309276 + ... + 309343.

It is an arithmetic number, because the mean of its divisors is an integer number (4175685).

Almost surely, 2^21033046 is an apocalyptic number.

21033046 is a deficient number, since it is larger than the sum of its proper divisors (12372434).

21033046 is a wasteful number, since it uses less digits than its factorization.

21033046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618638.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 21033046 is about 4586.1798918054. The cubic root of 21033046 is about 276.0370583160.

Adding to 21033046 its reverse (64033012), we get a palindrome (85066058).

The spelling of 21033046 in words is "twenty-one million, thirty-three thousand, forty-six".