1980081342 has 16 divisors (see below), whose sum is σ = 4400180880. Its totient is φ = 660027096.

The previous prime is 1980081319. The next prime is 1980081349. The reversal of 1980081342 is 2431800891.

It is a junction number, because it is equal to n+sod(n) for n = 1980081297 and 1980081306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980081349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18334033 + ... + 18334140.

It is an arithmetic number, because the mean of its divisors is an integer number (275011305).

Almost surely, 2^1980081342 is an apocalyptic number.

1980081342 is an abundant number, since it is smaller than the sum of its proper divisors (2420099538).

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

1980081342 is a wasteful number, since it uses less digits than its factorization.

1980081342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36668184 (or 36668178 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1980081342 is about 44498.1049259404. The cubic root of 1980081342 is about 1255.7244309872.

The spelling of 1980081342 in words is "one billion, nine hundred eighty million, eighty-one thousand, three hundred forty-two".