20998676 has 12 divisors (see below), whose sum is σ = 37265760. Its totient is φ = 10351320.

The previous prime is 20998673. The next prime is 20998727. The reversal of 20998676 is 67689902.

It is a self number, because there is not a number n which added to its sum of digits gives 20998676.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20998673) 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, 36686 + ... + 37253.

It is an arithmetic number, because the mean of its divisors is an integer number (3105480).

Almost surely, 2^20998676 is an apocalyptic number.

It is an amenable number.

20998676 is a deficient number, since it is larger than the sum of its proper divisors (16267084).

20998676 is a wasteful number, since it uses less digits than its factorization.

20998676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74014 (or 74012 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 20998676 is about 4582.4312324355. The cubic root of 20998676 is about 275.8866193962.

The spelling of 20998676 in words is "twenty million, nine hundred ninety-eight thousand, six hundred seventy-six".