21727248270 has 192 divisors, whose sum is σ = 65977644096. Its totient is φ = 4538419200.

The previous prime is 21727248233. The next prime is 21727248281. The reversal of 21727248270 is 7284272712.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1924482 + ... + 1935738.

It is an arithmetic number, because the mean of its divisors is an integer number (343633563).

Almost surely, 2^21727248270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21727248270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32988822048).

21727248270 is an abundant number, since it is smaller than the sum of its proper divisors (44250395826).

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

21727248270 is a wasteful number, since it uses less digits than its factorization.

21727248270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11395 (or 11388 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 42.

The spelling of 21727248270 in words is "twenty-one billion, seven hundred twenty-seven million, two hundred forty-eight thousand, two hundred seventy".