20886998 has 8 divisors (see below), whose sum is σ = 34178760. Its totient is φ = 9494080.

The previous prime is 20886991. The next prime is 20887001. The reversal of 20886998 is 89968802.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886991) 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, 474683 + ... + 474726.

It is an arithmetic number, because the mean of its divisors is an integer number (4272345).

Almost surely, 2^20886998 is an apocalyptic number.

20886998 is a deficient number, since it is larger than the sum of its proper divisors (13291762).

20886998 is a wasteful number, since it uses less digits than its factorization.

20886998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949422.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 20886998 is about 4570.2295347170. The cubic root of 20886998 is about 275.3966639348.

The spelling of 20886998 in words is "twenty million, eight hundred eighty-six thousand, nine hundred ninety-eight".