2102131394 has 32 divisors (see below), whose sum is σ = 3545954496. Its totient is φ = 926233920.

The previous prime is 2102131387. The next prime is 2102131397. The reversal of 2102131394 is 4931312012.

It is not an unprimeable number, because it can be changed into a prime (2102131397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220817 + ... + 230139.

It is an arithmetic number, because the mean of its divisors is an integer number (110811078).

Almost surely, 2^2102131394 is an apocalyptic number.

2102131394 is a deficient number, since it is larger than the sum of its proper divisors (1443823102).

2102131394 is a wasteful number, since it uses less digits than its factorization.

2102131394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9650.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2102131394 is about 45849.0064668800. The cubic root of 2102131394 is about 1281.0122595687.

The spelling of 2102131394 in words is "two billion, one hundred two million, one hundred thirty-one thousand, three hundred ninety-four".