20523139100 has 36 divisors (see below), whose sum is σ = 44929353504. Its totient is φ = 8136602880.

The previous prime is 20523139099. The next prime is 20523139121. The reversal of 20523139100 is 193132502.

It is a self number, because there is not a number n which added to its sum of digits gives 20523139100.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 896804 + ... + 919403.

Almost surely, 2^20523139100 is an apocalyptic number.

20523139100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20523139100 is an abundant number, since it is smaller than the sum of its proper divisors (24406214404).

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

20523139100 is a wasteful number, since it uses less digits than its factorization.

20523139100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816334 (or 1816327 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The spelling of 20523139100 in words is "twenty billion, five hundred twenty-three million, one hundred thirty-nine thousand, one hundred".