21146621636133 has 24 divisors (see below), whose sum is σ = 34920490582848. Its totient is φ = 12079705459392.

The previous prime is 21146621636131. The next prime is 21146621636137. The reversal of 21146621636133 is 33163612664112.

21146621636133 is a `hidden beast` number, since 2 + 1 + 1 + 4 + 6 + 6 + 2 + 1 + 636 + 1 + 3 + 3 = 666.

It is not a de Polignac number, because 21146621636133 - 2¹ = 21146621636131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21146621636131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56455360 + ... + 56828697.

It is an arithmetic number, because the mean of its divisors is an integer number (1455020440952).

Almost surely, 2^{21146621636133} is an apocalyptic number.

It is an amenable number.

21146621636133 is a deficient number, since it is larger than the sum of its proper divisors (13773868946715).

21146621636133 is a wasteful number, since it uses less digits than its factorization.

21146621636133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113287033 (or 113287030 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The spelling of 21146621636133 in words is "twenty-one trillion, one hundred forty-six billion, six hundred twenty-one million, six hundred thirty-six thousand, one hundred thirty-three".