21414400002 has 16 divisors (see below), whose sum is σ = 47587555680. Its totient is φ = 7138133316.

The previous prime is 21414399983. The next prime is 21414400019. The reversal of 21414400002 is 20000441412.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198281428 + ... + 198281535.

It is an arithmetic number, because the mean of its divisors is an integer number (2974222230).

Almost surely, 2^21414400002 is an apocalyptic number.

21414400002 is an abundant number, since it is smaller than the sum of its proper divisors (26173155678).

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

21414400002 is a wasteful number, since it uses less digits than its factorization.

21414400002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396562974 (or 396562968 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21414400002 its reverse (20000441412), we get a palindrome (41414841414).

The spelling of 21414400002 in words is "twenty-one billion, four hundred fourteen million, four hundred thousand, two".