19412540 has 24 divisors (see below), whose sum is σ = 46590432. Its totient is φ = 6655680.

The previous prime is 19412539. The next prime is 19412563. The reversal of 19412540 is 4521491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69191 + ... + 69470.

It is an arithmetic number, because the mean of its divisors is an integer number (1941268).

Almost surely, 2^19412540 is an apocalyptic number.

19412540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19412540 is an abundant number, since it is smaller than the sum of its proper divisors (27177892).

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

19412540 is a wasteful number, since it uses less digits than its factorization.

19412540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138677 (or 138675 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 19412540 is about 4405.9664093136. The cubic root of 19412540 is about 268.7576208403.

The spelling of 19412540 in words is "nineteen million, four hundred twelve thousand, five hundred forty".