2126020609 has 4 divisors (see below), whose sum is σ = 2147070420. Its totient is φ = 2104970800.

The previous prime is 2126020591. The next prime is 2126020619. The reversal of 2126020609 is 9060206212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1819875600 + 306145009 = 42660^2 + 17497^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126020609 - 2²⁵ = 2092466177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2126020619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10524754 + ... + 10524955.

It is an arithmetic number, because the mean of its divisors is an integer number (536767605).

Almost surely, 2^2126020609 is an apocalyptic number.

It is an amenable number.

2126020609 is a deficient number, since it is larger than the sum of its proper divisors (21049811).

2126020609 is a wasteful number, since it uses less digits than its factorization.

2126020609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21049810.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2126020609 is about 46108.7910164645. The cubic root of 2126020609 is about 1285.8465877300.

The spelling of 2126020609 in words is "two billion, one hundred twenty-six million, twenty thousand, six hundred nine".