20536144536 has 32 divisors (see below), whose sum is σ = 51347142000. Its totient is φ = 6844477440.

The previous prime is 20536144469. The next prime is 20536144537. The reversal of 20536144536 is 63544163502.

It is a junction number, because it is equal to n+sod(n) for n = 20536144494 and 20536144503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20536144537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143440 + ... + 248288.

Almost surely, 2^20536144536 is an apocalyptic number.

It is an amenable number.

20536144536 is an abundant number, since it is smaller than the sum of its proper divisors (30810997464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20536144536 is a wasteful number, since it uses less digits than its factorization.

20536144536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113019 (or 113015 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 20536144536 in words is "twenty billion, five hundred thirty-six million, one hundred forty-four thousand, five hundred thirty-six".