19879461 has 12 divisors (see below), whose sum is σ = 32816992. Its totient is φ = 11359656.

The previous prime is 19879441. The next prime is 19879469. The reversal of 19879461 is 16497891.

It is a happy number.

It is not a de Polignac number, because 19879461 - 2¹⁰ = 19878437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19879469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157711 + ... + 157836.

Almost surely, 2^19879461 is an apocalyptic number.

It is an amenable number.

19879461 is a deficient number, since it is larger than the sum of its proper divisors (12937531).

19879461 is a wasteful number, since it uses less digits than its factorization.

19879461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315560 (or 315557 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 19879461 is about 4458.6389178762. The cubic root of 19879461 is about 270.8953404586.

The spelling of 19879461 in words is "nineteen million, eight hundred seventy-nine thousand, four hundred sixty-one".