16000200021 has 32 divisors (see below), whose sum is σ = 23920968960. Its totient is φ = 9448588800.

The previous prime is 16000200017. The next prime is 16000200023. The reversal of 16000200021 is 12000200061.

It is not a de Polignac number, because 16000200021 - 2² = 16000200017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16000200023) 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, 15520 + ... + 179558.

It is an arithmetic number, because the mean of its divisors is an integer number (747530280).

Almost surely, 2^16000200021 is an apocalyptic number.

It is an amenable number.

16000200021 is a deficient number, since it is larger than the sum of its proper divisors (7920768939).

16000200021 is a wasteful number, since it uses less digits than its factorization.

16000200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164157.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 16000200021 its reverse (12000200061), we get a palindrome (28000400082).

The spelling of 16000200021 in words is "sixteen billion, two hundred thousand, twenty-one".