2004650721 has 32 divisors (see below), whose sum is σ = 3164958720. Its totient is φ = 1251111312.

The previous prime is 2004650717. The next prime is 2004650731. The reversal of 2004650721 is 1270564002.

2004650721 is a `hidden beast` number, since 2 + 0 + 0 + 4 + 650 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 2004650721 - 2² = 2004650717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2004650701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5155 + ... + 63528.

It is an arithmetic number, because the mean of its divisors is an integer number (98904960).

Almost surely, 2^2004650721 is an apocalyptic number.

It is an amenable number.

2004650721 is a deficient number, since it is larger than the sum of its proper divisors (1160307999).

2004650721 is a wasteful number, since it uses less digits than its factorization.

2004650721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68762 (or 68756 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 2004650721 is about 44773.3259988578. The cubic root of 2004650721 is about 1260.8968841107.

The spelling of 2004650721 in words is "two billion, four million, six hundred fifty thousand, seven hundred twenty-one".