16721254006 has 8 divisors (see below), whose sum is σ = 25106498280. Its totient is φ = 8352421248.

The previous prime is 16721254001. The next prime is 16721254031. The reversal of 16721254006 is 60045212761.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721254001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4100331 + ... + 4104406.

It is an arithmetic number, because the mean of its divisors is an integer number (3138312285).

Almost surely, 2^16721254006 is an apocalyptic number.

16721254006 is a deficient number, since it is larger than the sum of its proper divisors (8385244274).

16721254006 is a wasteful number, since it uses less digits than its factorization.

16721254006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8205758.

The product of its (nonzero) digits is 20160, while the sum is 34.

Adding to 16721254006 its reverse (60045212761), we get a palindrome (76766466767).

The spelling of 16721254006 in words is "sixteen billion, seven hundred twenty-one million, two hundred fifty-four thousand, six".