21004034 has 8 divisors (see below), whose sum is σ = 31561488. Its totient is φ = 10483540.

The previous prime is 21003937. The next prime is 21004043. The reversal of 21004034 is 43040012.

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

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, 7772 + ... + 10119.

It is an arithmetic number, because the mean of its divisors is an integer number (3945186).

Almost surely, 2^21004034 is an apocalyptic number.

21004034 is a deficient number, since it is larger than the sum of its proper divisors (10557454).

21004034 is a wasteful number, since it uses less digits than its factorization.

21004034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18480.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21004034 is about 4583.0158193050. The cubic root of 21004034 is about 275.9100823803.

Adding to 21004034 its reverse (43040012), we get a palindrome (64044046).

The spelling of 21004034 in words is "twenty-one million, four thousand, thirty-four".