20198430 has 64 divisors (see below), whose sum is σ = 61562880. Its totient is φ = 4616352.

The previous prime is 20198419. The next prime is 20198447. The reversal of 20198430 is 3489102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20198394 and 20198403.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3454 + ... + 7233.

It is an arithmetic number, because the mean of its divisors is an integer number (961920).

Almost surely, 2^20198430 is an apocalyptic number.

20198430 is an abundant number, since it is smaller than the sum of its proper divisors (41364450).

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

20198430 is a wasteful number, since it uses less digits than its factorization.

20198430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10710 (or 10704 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20198430 is about 4494.2663472473. The cubic root of 20198430 is about 272.3365122084.

The spelling of 20198430 in words is "twenty million, one hundred ninety-eight thousand, four hundred thirty".