21014355453 has 48 divisors (see below), whose sum is σ = 35133348096. Its totient is φ = 11074250880.

The previous prime is 21014355443. The next prime is 21014355487. The reversal of 21014355453 is 35455341012.

It is not a de Polignac number, because 21014355453 - 2¹² = 21014351357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014355403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2347975 + ... + 2356907.

It is an arithmetic number, because the mean of its divisors is an integer number (731944752).

Almost surely, 2^21014355453 is an apocalyptic number.

It is an amenable number.

21014355453 is a deficient number, since it is larger than the sum of its proper divisors (14118992643).

21014355453 is a wasteful number, since it uses less digits than its factorization.

21014355453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10194 (or 10187 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 21014355453 its reverse (35455341012), we get a palindrome (56469696465).

The spelling of 21014355453 in words is "twenty-one billion, fourteen million, three hundred fifty-five thousand, four hundred fifty-three".