21536882037 has 12 divisors (see below), whose sum is σ = 33936905184. Its totient is φ = 13052655720.

The previous prime is 21536882023. The next prime is 21536882053. The reversal of 21536882037 is 73028863512.

21536882037 is a `hidden beast` number, since 2 + 1 + 536 + 8 + 82 + 0 + 37 = 666.

It is not a de Polignac number, because 21536882037 - 2⁶ = 21536881973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21536881983 and 21536882001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21536882077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108772033 + ... + 108772230.

It is an arithmetic number, because the mean of its divisors is an integer number (2828075432).

Almost surely, 2^21536882037 is an apocalyptic number.

It is an amenable number.

21536882037 is a deficient number, since it is larger than the sum of its proper divisors (12400023147).

21536882037 is a wasteful number, since it uses less digits than its factorization.

21536882037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217544280 (or 217544277 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 21536882037 in words is "twenty-one billion, five hundred thirty-six million, eight hundred eighty-two thousand, thirty-seven".