21532850 has 24 divisors (see below), whose sum is σ = 40378368. Its totient is φ = 8542800.

The previous prime is 21532843. The next prime is 21532873. The reversal of 21532850 is 5823512.

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4655 + ... + 8045.

It is an arithmetic number, because the mean of its divisors is an integer number (1682432).

Almost surely, 2^21532850 is an apocalyptic number.

21532850 is a deficient number, since it is larger than the sum of its proper divisors (18845518).

21532850 is a wasteful number, since it uses less digits than its factorization.

21532850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3530 (or 3525 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 21532850 is about 4640.3502023015. The cubic root of 21532850 is about 278.2064353546.

The spelling of 21532850 in words is "twenty-one million, five hundred thirty-two thousand, eight hundred fifty".