21373606661152 has 48 divisors (see below), whose sum is σ = 43347130610112. Its totient is φ = 10366556808960.

The previous prime is 21373606661083. The next prime is 21373606661159. The reversal of 21373606661152 is 25116660637312.

It is a super-2 number, since 2×21373606661152² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21373606661096 and 21373606661105.

It is not an unprimeable number, because it can be changed into a prime (21373606661159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26877028 + ... + 27660835.

It is an arithmetic number, because the mean of its divisors is an integer number (903065221044).

Almost surely, 2^{21373606661152} is an apocalyptic number.

It is an amenable number.

21373606661152 is an abundant number, since it is smaller than the sum of its proper divisors (21973523948960).

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

21373606661152 is a wasteful number, since it uses less digits than its factorization.

21373606661152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54538241 (or 54538233 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 21373606661152 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred six million, six hundred sixty-one thousand, one hundred fifty-two".