19946427 has 4 divisors (see below), whose sum is σ = 26595240. Its totient is φ = 13297616.

The previous prime is 19946419. The next prime is 19946429. The reversal of 19946427 is 72464991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19946427 - 2³ = 19946419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19946429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3324402 + ... + 3324407.

It is an arithmetic number, because the mean of its divisors is an integer number (6648810).

Almost surely, 2^19946427 is an apocalyptic number.

19946427 is a deficient number, since it is larger than the sum of its proper divisors (6648813).

19946427 is an equidigital number, since it uses as much as digits as its factorization.

19946427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648812.

The product of its digits is 108864, while the sum is 42.

The square root of 19946427 is about 4466.1422950909. The cubic root of 19946427 is about 271.1991791075.

The spelling of 19946427 in words is "nineteen million, nine hundred forty-six thousand, four hundred twenty-seven".