20393498 has 8 divisors (see below), whose sum is σ = 32200320. Its totient is φ = 9660060.

The previous prime is 20393491. The next prime is 20393507. The reversal of 20393498 is 89439302.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 536671 = 20393498 / (2 + 0 + 3 + 9 + 3 + 4 + 9 + 8).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20393491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268298 + ... + 268373.

It is an arithmetic number, because the mean of its divisors is an integer number (4025040).

Almost surely, 2^20393498 is an apocalyptic number.

20393498 is a deficient number, since it is larger than the sum of its proper divisors (11806822).

20393498 is a wasteful number, since it uses less digits than its factorization.

20393498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536692.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 20393498 is about 4515.9160753938. The cubic root of 20393498 is about 273.2104090664.

The spelling of 20393498 in words is "twenty million, three hundred ninety-three thousand, four hundred ninety-eight".