16202543021 has 8 divisors (see below), whose sum is σ = 18518834880. Its totient is φ = 13886661888.

The previous prime is 16202543009. The next prime is 16202543023. The reversal of 16202543021 is 12034520261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16202543021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16202543023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12911 + ... + 180476.

It is an arithmetic number, because the mean of its divisors is an integer number (2314854360).

Almost surely, 2^16202543021 is an apocalyptic number.

It is an amenable number.

16202543021 is a deficient number, since it is larger than the sum of its proper divisors (2316291859).

16202543021 is a wasteful number, since it uses less digits than its factorization.

16202543021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205363.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 16202543021 in words is "sixteen billion, two hundred two million, five hundred forty-three thousand, twenty-one".