21069350 has 24 divisors (see below), whose sum is σ = 39353880. Its totient is φ = 8392320.

The previous prime is 21069343. The next prime is 21069359. The reversal of 21069350 is 5396012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21069359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13406 + ... + 14894.

It is an arithmetic number, because the mean of its divisors is an integer number (1639745).

Almost surely, 2^21069350 is an apocalyptic number.

21069350 is a deficient number, since it is larger than the sum of its proper divisors (18284530).

21069350 is a wasteful number, since it uses less digits than its factorization.

21069350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 21069350 is about 4590.1361635577. The cubic root of 21069350 is about 276.1957845600.

The spelling of 21069350 in words is "twenty-one million, sixty-nine thousand, three hundred fifty".