20998106 has 8 divisors (see below), whose sum is σ = 31562784. Its totient is φ = 10477180.

The previous prime is 20998093. The next prime is 20998139. The reversal of 20998106 is 60189902.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9710 + ... + 11673.

It is an arithmetic number, because the mean of its divisors is an integer number (3945348).

Almost surely, 2^20998106 is an apocalyptic number.

20998106 is a deficient number, since it is larger than the sum of its proper divisors (10564678).

20998106 is a wasteful number, since it uses less digits than its factorization.

20998106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21876.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 20998106 is about 4582.3690379541. The cubic root of 20998106 is about 275.8841230992.

The spelling of 20998106 in words is "twenty million, nine hundred ninety-eight thousand, one hundred six".