19325661 has 4 divisors (see below), whose sum is σ = 25767552. Its totient is φ = 12883772.

The previous prime is 19325653. The next prime is 19325689. The reversal of 19325661 is 16652391.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19325661 - 2³ = 19325653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19325611) 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, 3220941 + ... + 3220946.

It is an arithmetic number, because the mean of its divisors is an integer number (6441888).

Almost surely, 2^19325661 is an apocalyptic number.

It is an amenable number.

19325661 is a deficient number, since it is larger than the sum of its proper divisors (6441891).

19325661 is an equidigital number, since it uses as much as digits as its factorization.

19325661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6441890.

The product of its digits is 9720, while the sum is 33.

The square root of 19325661 is about 4396.0961090495. The cubic root of 19325661 is about 268.3560880703.

The spelling of 19325661 in words is "nineteen million, three hundred twenty-five thousand, six hundred sixty-one".