1982111810 has 32 divisors (see below), whose sum is σ = 4079064960. Its totient is φ = 679318272.

The previous prime is 1982111809. The next prime is 1982111819. The reversal of 1982111810 is 181112891.

It is a super-2 number, since 2×1982111810² = 7857534454682952200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1982111819) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 289001 + ... + 295779.

It is an arithmetic number, because the mean of its divisors is an integer number (127470780).

Almost surely, 2^1982111810 is an apocalyptic number.

1982111810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1982111810 is an abundant number, since it is smaller than the sum of its proper divisors (2096953150).

1982111810 is a wasteful number, since it uses less digits than its factorization.

1982111810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10970.

The product of its (nonzero) digits is 1152, while the sum is 32.

The square root of 1982111810 is about 44520.9142987877. The cubic root of 1982111810 is about 1256.1535105383.

The spelling of 1982111810 in words is "one billion, nine hundred eighty-two million, one hundred eleven thousand, eight hundred ten".