21146542633325 has 24 divisors (see below), whose sum is σ = 26244061195200. Its totient is φ = 16902821145600.

The previous prime is 21146542633259. The next prime is 21146542633351. The reversal of 21146542633325 is 52333624564112.

It is not a de Polignac number, because 21146542633325 - 2¹⁰ = 21146542632301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21146542633325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166056077 + ... + 166183373.

It is an arithmetic number, because the mean of its divisors is an integer number (1093502549800).

Almost surely, 2^{21146542633325} is an apocalyptic number.

21146542633325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21146542633325 is a deficient number, since it is larger than the sum of its proper divisors (5097518561875).

21146542633325 is a wasteful number, since it uses less digits than its factorization.

21146542633325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132917 (or 132912 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 47.

The spelling of 21146542633325 in words is "twenty-one trillion, one hundred forty-six billion, five hundred forty-two million, six hundred thirty-three thousand, three hundred twenty-five".