2120020305 has 32 divisors (see below), whose sum is σ = 3730696704. Its totient is φ = 1021491456.

The previous prime is 2120020261. The next prime is 2120020313. The reversal of 2120020305 is 5030200212.

It is not a de Polignac number, because 2120020305 - 2¹⁰ = 2120019281 is a prime.

It is a super-2 number, since 2×2120020305² = 8988972187224586050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106494 + ... + 124823.

It is an arithmetic number, because the mean of its divisors is an integer number (116584272).

Almost surely, 2^2120020305 is an apocalyptic number.

It is an amenable number.

2120020305 is a deficient number, since it is larger than the sum of its proper divisors (1610676399).

2120020305 is a wasteful number, since it uses less digits than its factorization.

2120020305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231385.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2120020305 is about 46043.6782305671. The cubic root of 2120020305 is about 1284.6357590273.

Adding to 2120020305 its reverse (5030200212), we get a palindrome (7150220517).

The spelling of 2120020305 in words is "two billion, one hundred twenty million, twenty thousand, three hundred five".