19786872 has 32 divisors (see below), whose sum is σ = 56534400. Its totient is φ = 5653344.

The previous prime is 19786853. The next prime is 19786883. The reversal of 19786872 is 27868791.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58722 + ... + 59057.

It is an arithmetic number, because the mean of its divisors is an integer number (1766700).

Almost surely, 2^19786872 is an apocalyptic number.

19786872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19786872 is an abundant number, since it is smaller than the sum of its proper divisors (36747528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19786872 is a wasteful number, since it uses less digits than its factorization.

19786872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117795 (or 117791 counting only the distinct ones).

The product of its digits is 338688, while the sum is 48.

The square root of 19786872 is about 4448.2436983601. The cubic root of 19786872 is about 270.4741189507.

The spelling of 19786872 in words is "nineteen million, seven hundred eighty-six thousand, eight hundred seventy-two".