1980181206 has 24 divisors (see below), whose sum is σ = 4324180224. Its totient is φ = 654862320.

The previous prime is 1980181169. The next prime is 1980181211. The reversal of 1980181206 is 6021810891.

It is a super-2 number, since 2×1980181206² = 7842235217191228872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430825 + ... + 435396.

It is an arithmetic number, because the mean of its divisors is an integer number (180174176).

Almost surely, 2^1980181206 is an apocalyptic number.

1980181206 is an abundant number, since it is smaller than the sum of its proper divisors (2343999018).

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

1980181206 is a wasteful number, since it uses less digits than its factorization.

1980181206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866356 (or 866353 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1980181206 is about 44499.2270269945. The cubic root of 1980181206 is about 1255.7455411564.

The spelling of 1980181206 in words is "one billion, nine hundred eighty million, one hundred eighty-one thousand, two hundred six".