2001321974 has 16 divisors (see below), whose sum is σ = 3192835968. Its totient is φ = 937571712.

The previous prime is 2001321961. The next prime is 2001321983. The reversal of 2001321974 is 4791231002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124397 + ... + 139560.

It is an arithmetic number, because the mean of its divisors is an integer number (199552248).

Almost surely, 2^2001321974 is an apocalyptic number.

2001321974 is a deficient number, since it is larger than the sum of its proper divisors (1191513994).

2001321974 is a wasteful number, since it uses less digits than its factorization.

2001321974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264199.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2001321974 is about 44736.1372270785. The cubic root of 2001321974 is about 1260.1985858996.

Adding to 2001321974 its reverse (4791231002), we get a palindrome (6792552976).

The spelling of 2001321974 in words is "two billion, one million, three hundred twenty-one thousand, nine hundred seventy-four".