20268702720 has 528 divisors, whose sum is σ = 82893477888. Its totient is φ = 4481187840.

The previous prime is 20268702719. The next prime is 20268702739. The reversal of 20268702720 is 2720786202.

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 47 ways as a sum of consecutive naturals, for example, 9998347 + ... + 10000373.

Almost surely, 2^20268702720 is an apocalyptic number.

20268702720 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 20268702720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41446738944).

20268702720 is an abundant number, since it is smaller than the sum of its proper divisors (62624775168).

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

20268702720 is a wasteful number, since it uses less digits than its factorization.

20268702720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 2075 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The spelling of 20268702720 in words is "twenty billion, two hundred sixty-eight million, seven hundred two thousand, seven hundred twenty".