19494863 has 2 divisors, whose sum is σ = 19494864. Its totient is φ = 19494862.

The previous prime is 19494841. The next prime is 19494899. The reversal of 19494863 is 36849491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19494863 - 2⁶ = 19494799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19494463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9747431 + 9747432.

It is an arithmetic number, because the mean of its divisors is an integer number (9747432).

Almost surely, 2^19494863 is an apocalyptic number.

19494863 is a deficient number, since it is larger than the sum of its proper divisors (1).

19494863 is an equidigital number, since it uses as much as digits as its factorization.

19494863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 19494863 is about 4415.2987441395. The cubic root of 19494863 is about 269.1369930045.

The spelling of 19494863 in words is "nineteen million, four hundred ninety-four thousand, eight hundred sixty-three".