19881283 has 2 divisors, whose sum is σ = 19881284. Its totient is φ = 19881282.

The previous prime is 19881259. The next prime is 19881311. The reversal of 19881283 is 38218891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19881283 - 2⁹ = 19880771 is a prime.

It is not a weakly prime, because it can be changed into another prime (19881233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9940641 + 9940642.

It is an arithmetic number, because the mean of its divisors is an integer number (9940642).

Almost surely, 2^19881283 is an apocalyptic number.

19881283 is a deficient number, since it is larger than the sum of its proper divisors (1).

19881283 is an equidigital number, since it uses as much as digits as its factorization.

19881283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 40.

The square root of 19881283 is about 4458.8432356386. The cubic root of 19881283 is about 270.9036162737.

It can be divided in two parts, 19881 and 283, that added together give a square (20164 = 142²).

The spelling of 19881283 in words is "nineteen million, eight hundred eighty-one thousand, two hundred eighty-three".