21982002 has 32 divisors (see below), whose sum is σ = 50491392. Its totient is φ = 6249744.

The previous prime is 21981991. The next prime is 21982013. The reversal of 21982002 is 20028912.

It is an interprime number because it is at equal distance from previous prime (21981991) and next prime (21982013).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8193 + ... + 10539.

It is an arithmetic number, because the mean of its divisors is an integer number (1577856).

Almost surely, 2^21982002 is an apocalyptic number.

21982002 is an abundant number, since it is smaller than the sum of its proper divisors (28509390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21982002 is a wasteful number, since it uses less digits than its factorization.

21982002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 21982002 is about 4688.4967740204. The cubic root of 21982002 is about 280.1275014556.

The spelling of 21982002 in words is "twenty-one million, nine hundred eighty-two thousand, two".