21162411330 has 32 divisors (see below), whose sum is σ = 52428169728. Its totient is φ = 5461267200.

The previous prime is 21162411329. The next prime is 21162411349. The reversal of 21162411330 is 3311426112.

It is a happy number.

It is a super-2 number, since 2×21162411330² (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 21162411330.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11376711 + ... + 11378570.

It is an arithmetic number, because the mean of its divisors is an integer number (1638380304).

Almost surely, 2^21162411330 is an apocalyptic number.

21162411330 is an abundant number, since it is smaller than the sum of its proper divisors (31265758398).

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

21162411330 is a wasteful number, since it uses less digits than its factorization.

21162411330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22755322.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21162411330 its reverse (3311426112), we get a palindrome (24473837442).

The spelling of 21162411330 in words is "twenty-one billion, one hundred sixty-two million, four hundred eleven thousand, three hundred thirty".