16241317821 has 12 divisors (see below), whose sum is σ = 23461239360. Its totient is φ = 10826826120.

The previous prime is 16241317783. The next prime is 16241317861. The reversal of 16241317821 is 12871314261.

16241317821 is a `hidden beast` number, since 1 + 624 + 1 + 3 + 1 + 7 + 8 + 21 = 666.

It is not a de Polignac number, because 16241317821 - 2¹³ = 16241309629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16241317861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107836 + ... + 210026.

It is an arithmetic number, because the mean of its divisors is an integer number (1955103280).

Almost surely, 2^16241317821 is an apocalyptic number.

It is an amenable number.

16241317821 is a deficient number, since it is larger than the sum of its proper divisors (7219921539).

16241317821 is a wasteful number, since it uses less digits than its factorization.

16241317821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119856 (or 119853 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The spelling of 16241317821 in words is "sixteen billion, two hundred forty-one million, three hundred seventeen thousand, eight hundred twenty-one".