21496718 has 16 divisors (see below), whose sum is σ = 32768736. Its totient is φ = 10575360.

The previous prime is 21496703. The next prime is 21496723. The reversal of 21496718 is 81769412.

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, 49430 + ... + 49862.

It is an arithmetic number, because the mean of its divisors is an integer number (2048046).

Almost surely, 2^21496718 is an apocalyptic number.

21496718 is a deficient number, since it is larger than the sum of its proper divisors (11272018).

21496718 is a wasteful number, since it uses less digits than its factorization.

21496718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779.

The product of its digits is 24192, while the sum is 38.

The square root of 21496718 is about 4636.4553270791. The cubic root of 21496718 is about 278.0507386299.

The spelling of 21496718 in words is "twenty-one million, four hundred ninety-six thousand, seven hundred eighteen".