16312005021 has 32 divisors (see below), whose sum is σ = 24035501952. Its totient is φ = 9776240640.

The previous prime is 16312004977. The next prime is 16312005029. The reversal of 16312005021 is 12050021361.

It is not a de Polignac number, because 16312005021 - 2⁶ = 16312004957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16312005029) 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, 939606 + ... + 956808.

It is an arithmetic number, because the mean of its divisors is an integer number (751109436).

Almost surely, 2^16312005021 is an apocalyptic number.

It is an amenable number.

16312005021 is a deficient number, since it is larger than the sum of its proper divisors (7723496931).

16312005021 is a wasteful number, since it uses less digits than its factorization.

16312005021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17853.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 16312005021 its reverse (12050021361), we get a palindrome (28362026382).

The spelling of 16312005021 in words is "sixteen billion, three hundred twelve million, five thousand, twenty-one".