20851198 has 8 divisors (see below), whose sum is σ = 31356000. Its totient is φ = 10399200.

The previous prime is 20851109. The next prime is 20851211. The reversal of 20851198 is 89115802.

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

It is a congruent number.

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, 12198 + ... + 13801.

It is an arithmetic number, because the mean of its divisors is an integer number (3919500).

Almost surely, 2^20851198 is an apocalyptic number.

20851198 is a deficient number, since it is larger than the sum of its proper divisors (10504802).

20851198 is a wasteful number, since it uses less digits than its factorization.

20851198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26402.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 20851198 is about 4566.3112027106. The cubic root of 20851198 is about 275.2392320438.

The spelling of 20851198 in words is "twenty million, eight hundred fifty-one thousand, one hundred ninety-eight".