20123873280 has 520 divisors, whose sum is σ = 82492150752. Its totient is φ = 4597088256.

The previous prime is 20123873269. The next prime is 20123873321. The reversal of 20123873280 is 8237832102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11611294 + ... + 11613026.

Almost surely, 2^20123873280 is an apocalyptic number.

20123873280 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 20123873280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41246075376).

20123873280 is an abundant number, since it is smaller than the sum of its proper divisors (62368277472).

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

20123873280 is an equidigital number, since it uses as much as digits as its factorization.

20123873280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781 (or 1750 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 20123873280 in words is "twenty billion, one hundred twenty-three million, eight hundred seventy-three thousand, two hundred eighty".