21466713750 has 80 divisors (see below), whose sum is σ = 53823958320. Its totient is φ = 5705856000.

The previous prime is 21466713731. The next prime is 21466713757. The reversal of 21466713750 is 5731766412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466713757) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1164606 + ... + 1182894.

It is an arithmetic number, because the mean of its divisors is an integer number (672799479).

Almost surely, 2^21466713750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21466713750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26911979160).

21466713750 is an abundant number, since it is smaller than the sum of its proper divisors (32357244570).

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

21466713750 is a wasteful number, since it uses less digits than its factorization.

21466713750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18627 (or 18612 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 21466713750 in words is "twenty-one billion, four hundred sixty-six million, seven hundred thirteen thousand, seven hundred fifty".