20949198 has 8 divisors (see below), whose sum is σ = 41898408. Its totient is φ = 6983064.

The previous prime is 20949167. The next prime is 20949199. The reversal of 20949198 is 89194902.

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

20949198 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20949199) 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, 1745761 + ... + 1745772.

It is an arithmetic number, because the mean of its divisors is an integer number (5237301).

Almost surely, 2^20949198 is an apocalyptic number.

20949198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20949198 is a wasteful number, since it uses less digits than its factorization.

20949198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491538.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 20949198 is about 4577.0293859664. The cubic root of 20949198 is about 275.6697636070.

The spelling of 20949198 in words is "twenty million, nine hundred forty-nine thousand, one hundred ninety-eight".