21703454 has 8 divisors (see below), whose sum is σ = 32619000. Its totient is φ = 10830456.

The previous prime is 21703427. The next prime is 21703469. The reversal of 21703454 is 45430712.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9329 + ... + 11420.

It is an arithmetic number, because the mean of its divisors is an integer number (4077375).

Almost surely, 2^21703454 is an apocalyptic number.

21703454 is a deficient number, since it is larger than the sum of its proper divisors (10915546).

21703454 is a wasteful number, since it uses less digits than its factorization.

21703454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21274.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 21703454 is about 4658.6965988353. The cubic root of 21703454 is about 278.9392432888.

The spelling of 21703454 in words is "twenty-one million, seven hundred three thousand, four hundred fifty-four".