20112910636 has 144 divisors (see below), whose sum is σ = 47551160160. Its totient is φ = 7353400320.

The previous prime is 20112910633. The next prime is 20112910637. The reversal of 20112910636 is 63601921102.

It is a junction number, because it is equal to n+sod(n) for n = 20112910598 and 20112910607.

It is not an unprimeable number, because it can be changed into a prime (20112910633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1979826 + ... + 1989958.

It is an arithmetic number, because the mean of its divisors is an integer number (330216390).

Almost surely, 2^20112910636 is an apocalyptic number.

20112910636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112910636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23775580080).

20112910636 is an abundant number, since it is smaller than the sum of its proper divisors (27438249524).

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

20112910636 is a wasteful number, since it uses less digits than its factorization.

20112910636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10224 (or 10215 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 20112910636 in words is "twenty billion, one hundred twelve million, nine hundred ten thousand, six hundred thirty-six".