2129813738 has 16 divisors (see below), whose sum is σ = 3441419520. Its totient is φ = 982719216.

The previous prime is 2129813729. The next prime is 2129813747. The reversal of 2129813738 is 8373189212.

It is an interprime number because it is at equal distance from previous prime (2129813729) and next prime (2129813747).

It is a super-2 number, since 2×2129813738² = 9072213117147065288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 108431 + ... + 126557.

It is an arithmetic number, because the mean of its divisors is an integer number (215088720).

Almost surely, 2^2129813738 is an apocalyptic number.

2129813738 is a deficient number, since it is larger than the sum of its proper divisors (1311605782).

2129813738 is a wasteful number, since it uses less digits than its factorization.

2129813738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22661.

The product of its digits is 145152, while the sum is 44.

The square root of 2129813738 is about 46149.9050703249. The cubic root of 2129813738 is about 1286.6108456398.

The spelling of 2129813738 in words is "two billion, one hundred twenty-nine million, eight hundred thirteen thousand, seven hundred thirty-eight".