21352553088 has 32 divisors (see below), whose sum is σ = 56717720160. Its totient is φ = 7117517568.

The previous prime is 21352553087. The next prime is 21352553099. The reversal of 21352553088 is 88035525312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (21352553087) 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, 27802420 + ... + 27803187.

It is an arithmetic number, because the mean of its divisors is an integer number (1772428755).

Almost surely, 2^21352553088 is an apocalyptic number.

It is an amenable number.

21352553088 is an abundant number, since it is smaller than the sum of its proper divisors (35365167072).

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

21352553088 is an equidigital number, since it uses as much as digits as its factorization.

21352553088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55605624 (or 55605612 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 21352553088 in words is "twenty-one billion, three hundred fifty-two million, five hundred fifty-three thousand, eighty-eight".