20198937 has 16 divisors (see below), whose sum is σ = 30098880. Its totient is φ = 11942400.

The previous prime is 20198921. The next prime is 20198947. The reversal of 20198937 is 73989102.

It is not a de Polignac number, because 20198937 - 2⁴ = 20198921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20198895 and 20198904.

It is not an unprimeable number, because it can be changed into a prime (20198917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6112 + ... + 8817.

It is an arithmetic number, because the mean of its divisors is an integer number (1881180).

Almost surely, 2^20198937 is an apocalyptic number.

It is an amenable number.

20198937 is a deficient number, since it is larger than the sum of its proper divisors (9899943).

20198937 is a wasteful number, since it uses less digits than its factorization.

20198937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14984.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 20198937 is about 4494.3227520951. The cubic root of 20198937 is about 272.3387908253.

The spelling of 20198937 in words is "twenty million, one hundred ninety-eight thousand, nine hundred thirty-seven".