21214036533455 has 8 divisors (see below), whose sum is σ = 25888315770000. Its totient is φ = 16683581273536.

The previous prime is 21214036533421. The next prime is 21214036533463. The reversal of 21214036533455 is 55433563041212.

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

It is a cyclic number.

It is not a de Polignac number, because 21214036533455 - 2¹⁴ = 21214036517071 is a prime.

It is a congruent number.

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, 35955993830 + ... + 35955994419.

It is an arithmetic number, because the mean of its divisors is an integer number (3236039471250).

Almost surely, 2^{21214036533455} is an apocalyptic number.

21214036533455 is a deficient number, since it is larger than the sum of its proper divisors (4674279236545).

21214036533455 is an equidigital number, since it uses as much as digits as its factorization.

21214036533455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71911988313.

The product of its (nonzero) digits is 1296000, while the sum is 44.

Adding to 21214036533455 its reverse (55433563041212), we get a palindrome (76647599574667).

The spelling of 21214036533455 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-three thousand, four hundred fifty-five".