19961598 has 8 divisors (see below), whose sum is σ = 39923208. Its totient is φ = 6653864.

The previous prime is 19961593. The next prime is 19961603. The reversal of 19961598 is 89516991.

It is an interprime number because it is at equal distance from previous prime (19961593) and next prime (19961603).

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

19961598 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19961593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663461 + ... + 1663472.

It is an arithmetic number, because the mean of its divisors is an integer number (4990401).

Almost surely, 2^19961598 is an apocalyptic number.

19961598 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19961598 is a wasteful number, since it uses less digits than its factorization.

19961598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326938.

The product of its digits is 174960, while the sum is 48.

The square root of 19961598 is about 4467.8404179200. The cubic root of 19961598 is about 271.2679185711.

The spelling of 19961598 in words is "nineteen million, nine hundred sixty-one thousand, five hundred ninety-eight".