21152350531364 has 12 divisors (see below), whose sum is σ = 39864045232284. Its totient is φ = 9762623322144.

The previous prime is 21152350531289. The next prime is 21152350531373. The reversal of 21152350531364 is 46313505325112.

It can be written as a sum of positive squares in 2 ways, for example, as 890018654464 + 20262331876900 = 943408^2 + 4501370^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203387985827 + ... + 203387985930.

It is an arithmetic number, because the mean of its divisors is an integer number (3322003769357).

Almost surely, 2^{21152350531364} is an apocalyptic number.

It is an amenable number.

21152350531364 is a deficient number, since it is larger than the sum of its proper divisors (18711694700920).

21152350531364 is a wasteful number, since it uses less digits than its factorization.

21152350531364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406775971774 (or 406775971772 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

Adding to 21152350531364 its reverse (46313505325112), we get a palindrome (67465855856476).

The spelling of 21152350531364 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred fifty million, five hundred thirty-one thousand, three hundred sixty-four".