21953268350 has 48 divisors (see below), whose sum is σ = 43995642432. Its totient is φ = 8101848960.

The previous prime is 21953268299. The next prime is 21953268353. The reversal of 21953268350 is 5386235912.

It is a super-2 number, since 2×21953268350² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21953268353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1541864 + ... + 1556036.

It is an arithmetic number, because the mean of its divisors is an integer number (916575884).

Almost surely, 2^21953268350 is an apocalyptic number.

21953268350 is an abundant number, since it is smaller than the sum of its proper divisors (22042374082).

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

21953268350 is a wasteful number, since it uses less digits than its factorization.

21953268350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16581 (or 16576 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 21953268350 in words is "twenty-one billion, nine hundred fifty-three million, two hundred sixty-eight thousand, three hundred fifty".