2013337921 has 6 divisors (see below), whose sum is σ = 2342046210. Its totient is φ = 1725718176.

The previous prime is 2013337903. The next prime is 2013337981. The reversal of 2013337921 is 1297333102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1524043521 + 489294400 = 39039^2 + 22120^2 .

It is not a de Polignac number, because 2013337921 - 2⁹ = 2013337409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2013337901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20544216 + ... + 20544313.

It is an arithmetic number, because the mean of its divisors is an integer number (390341035).

Almost surely, 2^2013337921 is an apocalyptic number.

It is an amenable number.

2013337921 is a deficient number, since it is larger than the sum of its proper divisors (328708289).

2013337921 is an equidigital number, since it uses as much as digits as its factorization.

2013337921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41088543 (or 41088536 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 2013337921 is about 44870.2342427583. The cubic root of 2013337921 is about 1262.7156346508.

The spelling of 2013337921 in words is "two billion, thirteen million, three hundred thirty-seven thousand, nine hundred twenty-one".