21910552248 has 128 divisors (see below), whose sum is σ = 61076736000. Its totient is φ = 6504537600.

The previous prime is 21910552247. The next prime is 21910552249. The reversal of 21910552248 is 84225501912.

It is an interprime number because it is at equal distance from previous prime (21910552247) and next prime (21910552249).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21910552247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3372283 + ... + 3378773.

It is an arithmetic number, because the mean of its divisors is an integer number (477162000).

Almost surely, 2^21910552248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21910552248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30538368000).

21910552248 is an abundant number, since it is smaller than the sum of its proper divisors (39166183752).

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

21910552248 is a wasteful number, since it uses less digits than its factorization.

21910552248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6893 (or 6889 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The spelling of 21910552248 in words is "twenty-one billion, nine hundred ten million, five hundred fifty-two thousand, two hundred forty-eight".