20344457982 has 16 divisors (see below), whose sum is σ = 40776802560. Its totient is φ = 6766838232.

The previous prime is 20344457981. The next prime is 20344457983. The reversal of 20344457982 is 28975444302.

It is an interprime number because it is at equal distance from previous prime (20344457981) and next prime (20344457983).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344457981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3658932 + ... + 3664487.

It is an arithmetic number, because the mean of its divisors is an integer number (2548550160).

Almost surely, 2^20344457982 is an apocalyptic number.

20344457982 is an abundant number, since it is smaller than the sum of its proper divisors (20432344578).

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

20344457982 is a wasteful number, since it uses less digits than its factorization.

20344457982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7323887.

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 20344457982 in words is "twenty billion, three hundred forty-four million, four hundred fifty-seven thousand, nine hundred eighty-two".