21060299 has 8 divisors (see below), whose sum is σ = 22735440. Its totient is φ = 19393056.

The previous prime is 21060287. The next prime is 21060313. The reversal of 21060299 is 99206012.

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

It is a cyclic number.

It is not a de Polignac number, because 21060299 - 2²⁰ = 20011723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21060209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4337 + ... + 7805.

It is an arithmetic number, because the mean of its divisors is an integer number (2841930).

Almost surely, 2^21060299 is an apocalyptic number.

21060299 is a deficient number, since it is larger than the sum of its proper divisors (1675141).

21060299 is a wasteful number, since it uses less digits than its factorization.

21060299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 21060299 is about 4589.1501391870. The cubic root of 21060299 is about 276.1562293753.

The spelling of 21060299 in words is "twenty-one million, sixty thousand, two hundred ninety-nine".