21547126848 has 252 divisors, whose sum is σ = 63880770384. Its totient is φ = 6406732800.

The previous prime is 21547126847. The next prime is 21547126849. The reversal of 21547126848 is 84862174512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21547126847) and next prime (21547126849).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 21547126797 and 21547126806.

It is not an unprimeable number, because it can be changed into a prime (21547126841) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31182183 + ... + 31182873.

Almost surely, 2^21547126848 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 21547126848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31940385192).

21547126848 is an abundant number, since it is smaller than the sum of its proper divisors (42333643536).

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

21547126848 is a wasteful number, since it uses less digits than its factorization.

21547126848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 740 counting only the distinct ones).

The product of its digits is 860160, while the sum is 48.

The spelling of 21547126848 in words is "twenty-one billion, five hundred forty-seven million, one hundred twenty-six thousand, eight hundred forty-eight".