2120729384 has 32 divisors (see below), whose sum is σ = 4283004000. Its totient is φ = 981191232.

The previous prime is 2120729381. The next prime is 2120729389. The reversal of 2120729384 is 4839270212.

It is a super-2 number, since 2×2120729384² = 8994986240322038912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (2120729381) 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, 155699 + ... + 168770.

It is an arithmetic number, because the mean of its divisors is an integer number (133843875).

Almost surely, 2^2120729384 is an apocalyptic number.

It is an amenable number.

2120729384 is an abundant number, since it is smaller than the sum of its proper divisors (2162274616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2120729384 is a wasteful number, since it uses less digits than its factorization.

2120729384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324537 (or 324533 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 2120729384 is about 46051.3776558313. The cubic root of 2120729384 is about 1284.7789662566.

Adding to 2120729384 its reverse (4839270212), we get a palindrome (6959999596).

The spelling of 2120729384 in words is "two billion, one hundred twenty million, seven hundred twenty-nine thousand, three hundred eighty-four".