19445961 has 8 divisors (see below), whose sum is σ = 26115040. Its totient is φ = 12870432.

The previous prime is 19445903. The next prime is 19445969. The reversal of 19445961 is 16954491.

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

It is not a de Polignac number, because 19445961 - 2⁹ = 19445449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19445969) 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 7 ways as a sum of consecutive naturals, for example, 22900 + ... + 23733.

It is an arithmetic number, because the mean of its divisors is an integer number (3264380).

Almost surely, 2^19445961 is an apocalyptic number.

It is an amenable number.

19445961 is a deficient number, since it is larger than the sum of its proper divisors (6669079).

19445961 is a wasteful number, since it uses less digits than its factorization.

19445961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46775.

The product of its digits is 38880, while the sum is 39.

The square root of 19445961 is about 4409.7574763245. The cubic root of 19445961 is about 268.9117651676.

The spelling of 19445961 in words is "nineteen million, four hundred forty-five thousand, nine hundred sixty-one".