21401500003 has 16 divisors (see below), whose sum is σ = 24916517920. Its totient is φ = 18209650176.

The previous prime is 21401499997. The next prime is 21401500007. The reversal of 21401500003 is 30000510412.

It is a cyclic number.

It is not a de Polignac number, because 21401500003 - 2³³ = 12811565411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21401500003.

It is not an unprimeable number, because it can be changed into a prime (21401500007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1161750 + ... + 1180027.

It is an arithmetic number, because the mean of its divisors is an integer number (1557282370).

Almost surely, 2^21401500003 is an apocalyptic number.

21401500003 is a deficient number, since it is larger than the sum of its proper divisors (3515017917).

21401500003 is a wasteful number, since it uses less digits than its factorization.

21401500003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341846.

The product of its (nonzero) digits is 120, while the sum is 16.

The spelling of 21401500003 in words is "twenty-one billion, four hundred one million, five hundred thousand, three".