19963427 has 6 divisors (see below), whose sum is σ = 21943404. Its totient is φ = 18148460.

The previous prime is 19963421. The next prime is 19963429. The reversal of 19963427 is 72436991.

It is not a de Polignac number, because 19963427 - 2²⁰ = 18914851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19963421) 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 5 ways as a sum of consecutive naturals, for example, 82373 + ... + 82614.

It is an arithmetic number, because the mean of its divisors is an integer number (3657234).

Almost surely, 2^19963427 is an apocalyptic number.

19963427 is a deficient number, since it is larger than the sum of its proper divisors (1979977).

19963427 is a wasteful number, since it uses less digits than its factorization.

19963427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165009 (or 164998 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The square root of 19963427 is about 4468.0450982505. The cubic root of 19963427 is about 271.2762033766.

The spelling of 19963427 in words is "nineteen million, nine hundred sixty-three thousand, four hundred twenty-seven".