21204130014 has 24 divisors (see below), whose sum is σ = 47424292032. Its totient is φ = 6840041760.

The previous prime is 21204129959. The next prime is 21204130069. The reversal of 21204130014 is 41003140212.

It is an interprime number because it is at equal distance from previous prime (21204129959) and next prime (21204130069).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18999559 + ... + 19000674.

It is an arithmetic number, because the mean of its divisors is an integer number (1976012168).

Almost surely, 2^21204130014 is an apocalyptic number.

21204130014 is an abundant number, since it is smaller than the sum of its proper divisors (26220162018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21204130014 is a wasteful number, since it uses less digits than its factorization.

21204130014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38000272 (or 38000269 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21204130014 its reverse (41003140212), we get a palindrome (62207270226).

The spelling of 21204130014 in words is "twenty-one billion, two hundred four million, one hundred thirty thousand, fourteen".