19856468 has 12 divisors (see below), whose sum is σ = 34876212. Its totient is φ = 9891840.

The previous prime is 19856401. The next prime is 19856477. The reversal of 19856468 is 86465891.

It can be written as a sum of positive squares in 2 ways, for example, as 1435204 + 18421264 = 1198^2 + 4292^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7853 + ... + 10068.

It is an arithmetic number, because the mean of its divisors is an integer number (2906351).

Almost surely, 2^19856468 is an apocalyptic number.

It is an amenable number.

19856468 is a deficient number, since it is larger than the sum of its proper divisors (15019744).

19856468 is a wasteful number, since it uses less digits than its factorization.

19856468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202 (or 18200 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The square root of 19856468 is about 4456.0596943937. The cubic root of 19856468 is about 270.7908590959.

The spelling of 19856468 in words is "nineteen million, eight hundred fifty-six thousand, four hundred sixty-eight".