21973351330 has 32 divisors (see below), whose sum is σ = 46761027840. Its totient is φ = 7273936320.

The previous prime is 21973351327. The next prime is 21973351331. The reversal of 21973351330 is 3315337912.

It is a super-2 number, since 2×21973351330² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21973351330.

It is not an unprimeable number, because it can be changed into a prime (21973351331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5410126 + ... + 5414185.

It is an arithmetic number, because the mean of its divisors is an integer number (1461282120).

Almost surely, 2^21973351330 is an apocalyptic number.

21973351330 is an abundant number, since it is smaller than the sum of its proper divisors (24787676510).

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

21973351330 is a wasteful number, since it uses less digits than its factorization.

21973351330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10824354.

The product of its (nonzero) digits is 51030, while the sum is 37.

The spelling of 21973351330 in words is "twenty-one billion, nine hundred seventy-three million, three hundred fifty-one thousand, three hundred thirty".