21214036503466 has 8 divisors (see below), whose sum is σ = 31821249062304. Its totient is φ = 10606953482700.

The previous prime is 21214036503427. The next prime is 21214036503467. The reversal of 21214036503466 is 66430563041212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21214036503467) 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, 31974060 + ... + 32630791.

It is an arithmetic number, because the mean of its divisors is an integer number (3977656132788).

Almost surely, 2^{21214036503466} is an apocalyptic number.

21214036503466 is a deficient number, since it is larger than the sum of its proper divisors (10607212558838).

21214036503466 is a wasteful number, since it uses less digits than its factorization.

21214036503466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64769036.

The product of its (nonzero) digits is 622080, while the sum is 43.

Adding to 21214036503466 its reverse (66430563041212), we get a palindrome (87644599544678).

The spelling of 21214036503466 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred three thousand, four hundred sixty-six".