2129997830 has 16 divisors (see below), whose sum is σ = 4059525600. Its totient is φ = 801881472.

The previous prime is 2129997803. The next prime is 2129997851. The reversal of 2129997830 is 387999212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6264530 + ... + 6264869.

It is an arithmetic number, because the mean of its divisors is an integer number (253720350).

Almost surely, 2^2129997830 is an apocalyptic number.

2129997830 is a deficient number, since it is larger than the sum of its proper divisors (1929527770).

2129997830 is a wasteful number, since it uses less digits than its factorization.

2129997830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12529423.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 2129997830 is about 46151.8995275384. The cubic root of 2129997830 is about 1286.6479142867.

The spelling of 2129997830 in words is "two billion, one hundred twenty-nine million, nine hundred ninety-seven thousand, eight hundred thirty".