21214036503456 has 96 divisors (see below), whose sum is σ = 60508627200000. Its totient is φ = 6483067165440.

The previous prime is 21214036503427. The next prime is 21214036503467. The reversal of 21214036503456 is 65430563041212.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187532206 + ... + 187645293.

It is an arithmetic number, because the mean of its divisors is an integer number (630298200000).

Almost surely, 2^{21214036503456} is an apocalyptic number.

It is an amenable number.

21214036503456 is an abundant number, since it is smaller than the sum of its proper divisors (39294590696544).

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

21214036503456 is a wasteful number, since it uses less digits than its factorization.

21214036503456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375177562 (or 375177554 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 21214036503456 its reverse (65430563041212), we get a palindrome (86644599544668).

The spelling of 21214036503456 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred three thousand, four hundred fifty-six".