1981962106 has 16 divisors (see below), whose sum is σ = 3059100000. Its totient is φ = 962520048.

The previous prime is 1981962071. The next prime is 1981962107. The reversal of 1981962106 is 6012691891.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (1981962107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48981 + ... + 79768.

It is an arithmetic number, because the mean of its divisors is an integer number (191193750).

Almost surely, 2^1981962106 is an apocalyptic number.

1981962106 is a deficient number, since it is larger than the sum of its proper divisors (1077137894).

1981962106 is a wasteful number, since it uses less digits than its factorization.

1981962106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128973.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1981962106 is about 44519.2329897989. The cubic root of 1981962106 is about 1256.1218850200.

The spelling of 1981962106 in words is "one billion, nine hundred eighty-one million, nine hundred sixty-two thousand, one hundred six".