2120140645 has 16 divisors (see below), whose sum is σ = 2940295680. Its totient is φ = 1437473664.

The previous prime is 2120140643. The next prime is 2120140657. The reversal of 2120140645 is 5460410212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2120140645 - 2¹ = 2120140643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120140643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337197 + ... + 343426.

It is an arithmetic number, because the mean of its divisors is an integer number (183768480).

Almost surely, 2^2120140645 is an apocalyptic number.

It is an amenable number.

2120140645 is a deficient number, since it is larger than the sum of its proper divisors (820155035).

2120140645 is an equidigital number, since it uses as much as digits as its factorization.

2120140645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680724.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2120140645 is about 46044.9850146571. The cubic root of 2120140645 is about 1284.6600654207.

Adding to 2120140645 its reverse (5460410212), we get a palindrome (7580550857).

The spelling of 2120140645 in words is "two billion, one hundred twenty million, one hundred forty thousand, six hundred forty-five".