19268681 has 2 divisors, whose sum is σ = 19268682. Its totient is φ = 19268680.

The previous prime is 19268651. The next prime is 19268713. The reversal of 19268681 is 18686291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19009600 + 259081 = 4360^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 19268681 - 2⁶ = 19268617 is a prime.

It is a super-2 number, since 2×19268681² = 742564134959522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19268611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9634340 + 9634341.

It is an arithmetic number, because the mean of its divisors is an integer number (9634341).

Almost surely, 2^19268681 is an apocalyptic number.

It is an amenable number.

19268681 is a deficient number, since it is larger than the sum of its proper divisors (1).

19268681 is an equidigital number, since it uses as much as digits as its factorization.

19268681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 19268681 is about 4389.6105749827. The cubic root of 19268681 is about 268.0920870520.

The spelling of 19268681 in words is "nineteen million, two hundred sixty-eight thousand, six hundred eighty-one".