21245095368 has 288 divisors, whose sum is σ = 69636490560. Its totient is φ = 5950039680.

The previous prime is 21245095363. The next prime is 21245095373. The reversal of 21245095368 is 86359054212.

It is an interprime number because it is at equal distance from previous prime (21245095363) and next prime (21245095373).

It is not an unprimeable number, because it can be changed into a prime (21245095363) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19472503 + ... + 19473593.

It is an arithmetic number, because the mean of its divisors is an integer number (241793370).

Almost surely, 2^21245095368 is an apocalyptic number.

21245095368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21245095368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34818245280).

21245095368 is an abundant number, since it is smaller than the sum of its proper divisors (48391395192).

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

21245095368 is an equidigital number, since it uses as much as digits as its factorization.

21245095368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 21245095368 in words is "twenty-one billion, two hundred forty-five million, ninety-five thousand, three hundred sixty-eight".