21498044 has 12 divisors (see below), whose sum is σ = 39601800. Its totient is φ = 10183248.

The previous prime is 21498041. The next prime is 21498067. The reversal of 21498044 is 44089412.

It is a self number, because there is not a number n which added to its sum of digits gives 21498044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21498041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141359 + ... + 141510.

It is an arithmetic number, because the mean of its divisors is an integer number (3300150).

Almost surely, 2^21498044 is an apocalyptic number.

It is an amenable number.

21498044 is a deficient number, since it is larger than the sum of its proper divisors (18103756).

21498044 is a wasteful number, since it uses less digits than its factorization.

21498044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282892 (or 282890 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 21498044 is about 4636.5983220460. The cubic root of 21498044 is about 278.0564555909.

The spelling of 21498044 in words is "twenty-one million, four hundred ninety-eight thousand, forty-four".