21414982 has 4 divisors (see below), whose sum is σ = 32122476. Its totient is φ = 10707490.

The previous prime is 21414973. The next prime is 21414983. The reversal of 21414982 is 28941412.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5353744 + ... + 5353747.

It is an arithmetic number, because the mean of its divisors is an integer number (8030619).

Almost surely, 2^21414982 is an apocalyptic number.

21414982 is a deficient number, since it is larger than the sum of its proper divisors (10707494).

21414982 is a wasteful number, since it uses less digits than its factorization.

21414982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10707493.

The product of its digits is 4608, while the sum is 31.

The square root of 21414982 is about 4627.6324400281. The cubic root of 21414982 is about 277.6978844488.

The spelling of 21414982 in words is "twenty-one million, four hundred fourteen thousand, nine hundred eighty-two".