21252606020316 has 48 divisors (see below), whose sum is σ = 60108380666880. Its totient is φ = 6440183642160.

The previous prime is 21252606020273. The next prime is 21252606020473. The reversal of 21252606020316 is 61302060625212.

21252606020316 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 260 + 60 + 20 + 316 = 666.

It is a super-3 number, since 3×21252606020316³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8944698316 + ... + 8944700691.

It is an arithmetic number, because the mean of its divisors is an integer number (1252257930560).

Almost surely, 2^{21252606020316} is an apocalyptic number.

It is an amenable number.

21252606020316 is an abundant number, since it is smaller than the sum of its proper divisors (38855774646564).

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

21252606020316 is a wasteful number, since it uses less digits than its factorization.

21252606020316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17889399031 (or 17889399023 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 21252606020316 its reverse (61302060625212), we get a palindrome (82554666645528).

The spelling of 21252606020316 in words is "twenty-one trillion, two hundred fifty-two billion, six hundred six million, twenty thousand, three hundred sixteen".