21463053853 has 4 divisors (see below), whose sum is σ = 21527897248. Its totient is φ = 21398210460.

The previous prime is 21463053827. The next prime is 21463053881. The reversal of 21463053853 is 35835036412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21463053853 - 2⁹ = 21463053341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463053803) 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, 32421201 + ... + 32421862.

It is an arithmetic number, because the mean of its divisors is an integer number (5381974312).

Almost surely, 2^21463053853 is an apocalyptic number.

It is an amenable number.

21463053853 is a deficient number, since it is larger than the sum of its proper divisors (64843395).

21463053853 is an equidigital number, since it uses as much as digits as its factorization.

21463053853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64843394.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 21463053853 in words is "twenty-one billion, four hundred sixty-three million, fifty-three thousand, eight hundred fifty-three".