19893427 has 2 divisors, whose sum is σ = 19893428. Its totient is φ = 19893426.

The previous prime is 19893421. The next prime is 19893479. The reversal of 19893427 is 72439891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19893427 - 2⁷ = 19893299 is a prime.

It is not a weakly prime, because it can be changed into another prime (19893421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9946713 + 9946714.

It is an arithmetic number, because the mean of its divisors is an integer number (9946714).

Almost surely, 2^19893427 is an apocalyptic number.

19893427 is a deficient number, since it is larger than the sum of its proper divisors (1).

19893427 is an equidigital number, since it uses as much as digits as its factorization.

19893427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 19893427 is about 4460.2048159249. The cubic root of 19893427 is about 270.9587633501.

The spelling of 19893427 in words is "nineteen million, eight hundred ninety-three thousand, four hundred twenty-seven".