21441974 has 8 divisors (see below), whose sum is σ = 32199768. Its totient is φ = 10708720.

The previous prime is 21441967. The next prime is 21441989. The reversal of 21441974 is 47914412.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21441974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3767 + ... + 7554.

It is an arithmetic number, because the mean of its divisors is an integer number (4024971).

Almost surely, 2^21441974 is an apocalyptic number.

21441974 is a deficient number, since it is larger than the sum of its proper divisors (10757794).

21441974 is a wasteful number, since it uses less digits than its factorization.

21441974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270.

The product of its digits is 8064, while the sum is 32.

The square root of 21441974 is about 4630.5479157439. The cubic root of 21441974 is about 277.8145080082.

The spelling of 21441974 in words is "twenty-one million, four hundred forty-one thousand, nine hundred seventy-four".