20928898 has 8 divisors (see below), whose sum is σ = 31448592. Its totient is φ = 10446036.

The previous prime is 20928877. The next prime is 20928907. The reversal of 20928898 is 89882902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7740 + ... + 10087.

It is an arithmetic number, because the mean of its divisors is an integer number (3931074).

Almost surely, 2^20928898 is an apocalyptic number.

20928898 is a deficient number, since it is larger than the sum of its proper divisors (10519694).

20928898 is a wasteful number, since it uses less digits than its factorization.

20928898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18416.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 20928898 is about 4574.8112529371. The cubic root of 20928898 is about 275.5806925006.

The spelling of 20928898 in words is "twenty million, nine hundred twenty-eight thousand, eight hundred ninety-eight".