21152206400316 has 48 divisors (see below), whose sum is σ = 49403407019904. Its totient is φ = 7043842797376.

The previous prime is 21152206400243. The next prime is 21152206400341. The reversal of 21152206400316 is 61300460225112.

It is a congruent number.

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, 124584115 + ... + 124753781.

It is an arithmetic number, because the mean of its divisors is an integer number (1029237646248).

Almost surely, 2^{21152206400316} is an apocalyptic number.

It is an amenable number.

21152206400316 is an abundant number, since it is smaller than the sum of its proper divisors (28251200619588).

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

21152206400316 is a wasteful number, since it uses less digits than its factorization.

21152206400316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179770 (or 179768 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 21152206400316 its reverse (61300460225112), we get a palindrome (82452666625428).

The spelling of 21152206400316 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred six million, four hundred thousand, three hundred sixteen".