20823936635 has 24 divisors (see below), whose sum is σ = 26581095936. Its totient is φ = 15657909120.

The previous prime is 20823936593. The next prime is 20823936659. The reversal of 20823936635 is 53663932802.

It is not a de Polignac number, because 20823936635 - 2⁸ = 20823936379 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20823936635.

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, 183815 + ... + 274655.

It is an arithmetic number, because the mean of its divisors is an integer number (1107545664).

Almost surely, 2^20823936635 is an apocalyptic number.

20823936635 is a deficient number, since it is larger than the sum of its proper divisors (5757159301).

20823936635 is a wasteful number, since it uses less digits than its factorization.

20823936635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91011 (or 90992 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 20823936635 in words is "twenty billion, eight hundred twenty-three million, nine hundred thirty-six thousand, six hundred thirty-five".