20197498 has 8 divisors (see below), whose sum is σ = 30940992. Its totient is φ = 9883836.

The previous prime is 20197477. The next prime is 20197501. The reversal of 20197498 is 89479102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20197498.

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 3 ways as a sum of consecutive naturals, for example, 107340 + ... + 107527.

It is an arithmetic number, because the mean of its divisors is an integer number (3867624).

Almost surely, 2^20197498 is an apocalyptic number.

20197498 is a deficient number, since it is larger than the sum of its proper divisors (10743494).

20197498 is a wasteful number, since it uses less digits than its factorization.

20197498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214916.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 20197498 is about 4494.1626583825. The cubic root of 20197498 is about 272.3323234087.

The spelling of 20197498 in words is "twenty million, one hundred ninety-seven thousand, four hundred ninety-eight".