19896740 has 12 divisors (see below), whose sum is σ = 41783196. Its totient is φ = 7958688.

The previous prime is 19896707. The next prime is 19896809. The reversal of 19896740 is 4769891.

It can be written as a sum of positive squares in 2 ways, for example, as 6310144 + 13586596 = 2512^2 + 3686^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19896691 and 19896700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497399 + ... + 497438.

It is an arithmetic number, because the mean of its divisors is an integer number (3481933).

Almost surely, 2^19896740 is an apocalyptic number.

19896740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19896740 is an abundant number, since it is smaller than the sum of its proper divisors (21886456).

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

19896740 is a wasteful number, since it uses less digits than its factorization.

19896740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994846 (or 994844 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 19896740 is about 4460.5761959639. The cubic root of 19896740 is about 270.9738041063.

The spelling of 19896740 in words is "nineteen million, eight hundred ninety-six thousand, seven hundred forty".