19457982 has 24 divisors (see below), whose sum is σ = 43721496. Its totient is φ = 6485832.

The previous prime is 19457969. The next prime is 19457983. The reversal of 19457982 is 28975491.

It is a super-2 number, since 2×19457982² = 757226127024648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19457983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19533 + ... + 20504.

It is an arithmetic number, because the mean of its divisors is an integer number (1821729).

Almost surely, 2^19457982 is an apocalyptic number.

19457982 is an abundant number, since it is smaller than the sum of its proper divisors (24263514).

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

19457982 is an equidigital number, since it uses as much as digits as its factorization.

19457982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40054 (or 40042 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 19457982 is about 4411.1202658735. The cubic root of 19457982 is about 268.9671652317.

The spelling of 19457982 in words is "nineteen million, four hundred fifty-seven thousand, nine hundred eighty-two".