21034104 has 64 divisors (see below), whose sum is σ = 64727040. Its totient is φ = 5546880.

The previous prime is 21034067. The next prime is 21034129. The reversal of 21034104 is 40143012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2632 + ... + 6999.

It is an arithmetic number, because the mean of its divisors is an integer number (1011360).

Almost surely, 2^21034104 is an apocalyptic number.

21034104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21034104 is an abundant number, since it is smaller than the sum of its proper divisors (43692936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21034104 is a wasteful number, since it uses less digits than its factorization.

21034104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9660 (or 9656 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21034104 is about 4586.2952368987. The cubic root of 21034104 is about 276.0416866251.

Adding to 21034104 its reverse (40143012), we get a palindrome (61177116).

The spelling of 21034104 in words is "twenty-one million, thirty-four thousand, one hundred four".