2001964451 has 2 divisors, whose sum is σ = 2001964452. Its totient is φ = 2001964450.

The previous prime is 2001964417. The next prime is 2001964501. The reversal of 2001964451 is 1544691002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001964451 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001964411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000982225 + 1000982226.

It is an arithmetic number, because the mean of its divisors is an integer number (1000982226).

Almost surely, 2^2001964451 is an apocalyptic number.

2001964451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001964451 is an equidigital number, since it uses as much as digits as its factorization.

2001964451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2001964451 is about 44743.3173893041. The cubic root of 2001964451 is about 1260.3334237707. Note that the first 3 decimals are identical.

The spelling of 2001964451 in words is "two billion, one million, nine hundred sixty-four thousand, four hundred fifty-one".