21034528 has 24 divisors (see below), whose sum is σ = 41549760. Its totient is φ = 10482240.

The previous prime is 21034513. The next prime is 21034543. The reversal of 21034528 is 82543012.

It is an interprime number because it is at equal distance from previous prime (21034513) and next prime (21034543).

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, 10573 + ... + 12403.

It is an arithmetic number, because the mean of its divisors is an integer number (1731240).

Almost surely, 2^21034528 is an apocalyptic number.

It is an amenable number.

21034528 is a deficient number, since it is larger than the sum of its proper divisors (20515232).

21034528 is a wasteful number, since it uses less digits than its factorization.

21034528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200 (or 2192 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 21034528 is about 4586.3414613393. The cubic root of 21034528 is about 276.0435414048.

The spelling of 21034528 in words is "twenty-one million, thirty-four thousand, five hundred twenty-eight".