19663413 has 32 divisors (see below), whose sum is σ = 34117632. Its totient is φ = 9768000.

The previous prime is 19663409. The next prime is 19663417. The reversal of 19663413 is 31436691.

It is an interprime number because it is at equal distance from previous prime (19663409) and next prime (19663417).

It is not a de Polignac number, because 19663413 - 2² = 19663409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19663417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3463 + ... + 7163.

It is an arithmetic number, because the mean of its divisors is an integer number (1066176).

Almost surely, 2^19663413 is an apocalyptic number.

It is an amenable number.

19663413 is a deficient number, since it is larger than the sum of its proper divisors (14454219).

19663413 is a wasteful number, since it uses less digits than its factorization.

19663413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745.

The product of its digits is 11664, while the sum is 33.

The square root of 19663413 is about 4434.3447091989. The cubic root of 19663413 is about 269.9104092330.

The spelling of 19663413 in words is "nineteen million, six hundred sixty-three thousand, four hundred thirteen".