19585961 has 4 divisors (see below), whose sum is σ = 19598292. Its totient is φ = 19573632.

The previous prime is 19585957. The next prime is 19585967. The reversal of 19585961 is 16958591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8323225 + 11262736 = 2885^2 + 3356^2 .

It is a cyclic number.

It is not a de Polignac number, because 19585961 - 2² = 19585957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19585967) 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, 3356 + ... + 7101.

It is an arithmetic number, because the mean of its divisors is an integer number (4899573).

Almost surely, 2^19585961 is an apocalyptic number.

It is an amenable number.

19585961 is a deficient number, since it is larger than the sum of its proper divisors (12331).

19585961 is a wasteful number, since it uses less digits than its factorization.

19585961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12330.

The product of its digits is 97200, while the sum is 44.

The square root of 19585961 is about 4425.6028967814. The cubic root of 19585961 is about 269.5555605459. Note that the first 4 decimals are identical.

The spelling of 19585961 in words is "nineteen million, five hundred eighty-five thousand, nine hundred sixty-one".