21464270 has 16 divisors (see below), whose sum is σ = 38942208. Its totient is φ = 8517600.

The previous prime is 21464269. The next prime is 21464291. The reversal of 21464270 is 7246412.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7181 + ... + 9720.

It is an arithmetic number, because the mean of its divisors is an integer number (2433888).

Almost surely, 2^21464270 is an apocalyptic number.

21464270 is a deficient number, since it is larger than the sum of its proper divisors (17477938).

21464270 is a wasteful number, since it uses less digits than its factorization.

21464270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17035.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 21464270 is about 4632.9547806988. The cubic root of 21464270 is about 277.9107679041.

The spelling of 21464270 in words is "twenty-one million, four hundred sixty-four thousand, two hundred seventy".