19456961 has 4 divisors (see below), whose sum is σ = 19786800. Its totient is φ = 19127124.

The previous prime is 19456951. The next prime is 19456963. The reversal of 19456961 is 16965491.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16965491 = 1879 ⋅9029.

It is a cyclic number.

It is not a de Polignac number, because 19456961 - 2⁶ = 19456897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19456963) by changing a digit.

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, 164831 + ... + 164948.

It is an arithmetic number, because the mean of its divisors is an integer number (4946700).

Almost surely, 2^19456961 is an apocalyptic number.

It is an amenable number.

19456961 is a deficient number, since it is larger than the sum of its proper divisors (329839).

19456961 is an equidigital number, since it uses as much as digits as its factorization.

19456961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329838.

The product of its digits is 58320, while the sum is 41.

The square root of 19456961 is about 4411.0045341169. The cubic root of 19456961 is about 268.9624607308.

The spelling of 19456961 in words is "nineteen million, four hundred fifty-six thousand, nine hundred sixty-one".