9821634136 has 8 divisors (see below), whose sum is σ = 18415564020. Its totient is φ = 4910817064.

The previous prime is 9821634107. The next prime is 9821634139. The reversal of 9821634136 is 6314361289.

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 = 9821634092 and 9821634101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9821634139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613852126 + ... + 613852141.

Almost surely, 2^9821634136 is an apocalyptic number.

It is an amenable number.

9821634136 is a deficient number, since it is larger than the sum of its proper divisors (8593929884).

9821634136 is a wasteful number, since it uses less digits than its factorization.

9821634136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227704273 (or 1227704269 counting only the distinct ones).

The product of its digits is 186624, while the sum is 43.

The square root of 9821634136 is about 99104.1580156958. The cubic root of 9821634136 is about 2141.5485149924.

The spelling of 9821634136 in words is "nine billion, eight hundred twenty-one million, six hundred thirty-four thousand, one hundred thirty-six".