21214637328253 has 8 divisors (see below), whose sum is σ = 22285583424000. Its totient is φ = 20156072112528.

The previous prime is 21214637328233. The next prime is 21214637328301. The reversal of 21214637328253 is 35282373641212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21214637328253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21214637328197 and 21214637328206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214637328233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3095216493 + ... + 3095223346.

It is an arithmetic number, because the mean of its divisors is an integer number (2785697928000).

Almost surely, 2^{21214637328253} is an apocalyptic number.

21214637328253 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21214637328253 is a deficient number, since it is larger than the sum of its proper divisors (1070946095747).

21214637328253 is a wasteful number, since it uses less digits than its factorization.

21214637328253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6190440011.

The product of its digits is 2903040, while the sum is 49.

The spelling of 21214637328253 in words is "twenty-one trillion, two hundred fourteen billion, six hundred thirty-seven million, three hundred twenty-eight thousand, two hundred fifty-three".