21940951296 has 108 divisors (see below), whose sum is σ = 64186432016. Its totient is φ = 6648744960.

The previous prime is 21940951199. The next prime is 21940951301. The reversal of 21940951296 is 69215904912.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25126 + ... + 210981.

Almost surely, 2^21940951296 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 21940951296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32093216008).

21940951296 is an abundant number, since it is smaller than the sum of its proper divisors (42245480720).

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

21940951296 is a wasteful number, since it uses less digits than its factorization.

21940951296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236148 (or 236123 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 21940951296 in words is "twenty-one billion, nine hundred forty million, nine hundred fifty-one thousand, two hundred ninety-six".