21116144003 has 4 divisors (see below), whose sum is σ = 21303012648. Its totient is φ = 20929275360.

The previous prime is 21116143957. The next prime is 21116144011. The reversal of 21116144003 is 30044161112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21116144003 - 2¹⁸ = 21115881859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21116144003.

It is not an unprimeable number, because it can be changed into a prime (21116144053) 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, 93434153 + ... + 93434378.

It is an arithmetic number, because the mean of its divisors is an integer number (5325753162).

Almost surely, 2^21116144003 is an apocalyptic number.

21116144003 is a deficient number, since it is larger than the sum of its proper divisors (186868645).

21116144003 is a wasteful number, since it uses less digits than its factorization.

21116144003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186868644.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 21116144003 in words is "twenty-one billion, one hundred sixteen million, one hundred forty-four thousand, three".