21468290 has 32 divisors (see below), whose sum is σ = 41109120. Its totient is φ = 8049024.

The previous prime is 21468289. The next prime is 21468353. The reversal of 21468290 is 9286412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19022 + ... + 20118.

It is an arithmetic number, because the mean of its divisors is an integer number (1284660).

Almost surely, 2^21468290 is an apocalyptic number.

21468290 is a deficient number, since it is larger than the sum of its proper divisors (19640830).

21468290 is a wasteful number, since it uses less digits than its factorization.

21468290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 21468290 is about 4633.3886087830. The cubic root of 21468290 is about 277.9281166042.

The spelling of 21468290 in words is "twenty-one million, four hundred sixty-eight thousand, two hundred ninety".