1963850021 has 16 divisors (see below), whose sum is σ = 2348075520. Its totient is φ = 1607291520.

The previous prime is 1963849973. The next prime is 1963850041. The reversal of 1963850021 is 1200583691.

It is a cyclic number.

It is not a de Polignac number, because 1963850021 - 2¹⁴ = 1963833637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1963850041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59306 + ... + 86283.

It is an arithmetic number, because the mean of its divisors is an integer number (146754720).

Almost surely, 2^1963850021 is an apocalyptic number.

It is an amenable number.

1963850021 is a deficient number, since it is larger than the sum of its proper divisors (384225499).

1963850021 is a wasteful number, since it uses less digits than its factorization.

1963850021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145684.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1963850021 is about 44315.3474656354. The cubic root of 1963850021 is about 1252.2838292379.

The spelling of 1963850021 in words is "one billion, nine hundred sixty-three million, eight hundred fifty thousand, twenty-one".