19630998 has 48 divisors (see below), whose sum is σ = 45566976. Its totient is φ = 6327720.

The previous prime is 19630993. The next prime is 19631021. The reversal of 19630998 is 89903691.

19630998 is a `hidden beast` number, since 1 + 9 + 630 + 9 + 9 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19630991) 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 23 ways as a sum of consecutive naturals, for example, 14415 + ... + 15717.

It is an arithmetic number, because the mean of its divisors is an integer number (949312).

Almost surely, 2^19630998 is an apocalyptic number.

19630998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19630998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22783488).

19630998 is an abundant number, since it is smaller than the sum of its proper divisors (25935978).

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

19630998 is a wasteful number, since it uses less digits than its factorization.

19630998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 19630998 is about 4430.6882083938. The cubic root of 19630998 is about 269.7620125133.

The spelling of 19630998 in words is "nineteen million, six hundred thirty thousand, nine hundred ninety-eight".