20023996860 has 144 divisors (see below), whose sum is σ = 69525683136. Its totient is φ = 4569716736.

The previous prime is 20023996859. The next prime is 20023996897. The reversal of 20023996860 is 6869932002.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 810612 + ... + 834948.

It is an arithmetic number, because the mean of its divisors is an integer number (482817244).

Almost surely, 2^20023996860 is an apocalyptic number.

20023996860 is a gapful number since it is divisible by the number (20) 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 20023996860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34762841568).

20023996860 is an abundant number, since it is smaller than the sum of its proper divisors (49501686276).

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

20023996860 is a wasteful number, since it uses less digits than its factorization.

20023996860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25012 (or 25007 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 20023996860 in words is "twenty billion, twenty-three million, nine hundred ninety-six thousand, eight hundred sixty".