21086352536 has 8 divisors (see below), whose sum is σ = 39536911020. Its totient is φ = 10543176264.

The previous prime is 21086352527. The next prime is 21086352583. The reversal of 21086352536 is 63525368012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21086352493 and 21086352502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1317897026 + ... + 1317897041.

Almost surely, 2^21086352536 is an apocalyptic number.

It is an amenable number.

21086352536 is a deficient number, since it is larger than the sum of its proper divisors (18450558484).

21086352536 is a wasteful number, since it uses less digits than its factorization.

21086352536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635794073 (or 2635794069 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 21086352536 in words is "twenty-one billion, eighty-six million, three hundred fifty-two thousand, five hundred thirty-six".