21422654 has 8 divisors (see below), whose sum is σ = 35055288. Its totient is φ = 9737560.

The previous prime is 21422641. The next prime is 21422689. The reversal of 21422654 is 45622412.

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, 486857 + ... + 486900.

It is an arithmetic number, because the mean of its divisors is an integer number (4381911).

Almost surely, 2^21422654 is an apocalyptic number.

21422654 is a deficient number, since it is larger than the sum of its proper divisors (13632634).

21422654 is a wasteful number, since it uses less digits than its factorization.

21422654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973770.

The product of its digits is 3840, while the sum is 26.

The square root of 21422654 is about 4628.4612993953. The cubic root of 21422654 is about 277.7310426026.

The spelling of 21422654 in words is "twenty-one million, four hundred twenty-two thousand, six hundred fifty-four".