20268323880 has 256 divisors, whose sum is σ = 72052416000. Its totient is φ = 4462768128.

The previous prime is 20268323863. The next prime is 20268323897. The reversal of 20268323880 is 8832386202.

It is an interprime number because it is at equal distance from previous prime (20268323863) and next prime (20268323897).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16491106 + ... + 16492334.

It is an arithmetic number, because the mean of its divisors is an integer number (281454750).

Almost surely, 2^20268323880 is an apocalyptic number.

20268323880 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 20268323880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36026208000).

20268323880 is an abundant number, since it is smaller than the sum of its proper divisors (51784092120).

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

20268323880 is a wasteful number, since it uses less digits than its factorization.

20268323880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 20268323880 in words is "twenty billion, two hundred sixty-eight million, three hundred twenty-three thousand, eight hundred eighty".