20718996480 has 1232 divisors, whose sum is σ = 93217825344. Its totient is φ = 4299816960.

The previous prime is 20718996469. The next prime is 20718996491. The reversal of 20718996480 is 8469981702.

20718996480 is a `hidden beast` number, since 2 + 0 + 71 + 8 + 9 + 96 + 480 = 666.

It is an interprime number because it is at equal distance from previous prime (20718996469) and next prime (20718996491).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 339655650 + ... + 339655710.

Almost surely, 2^20718996480 is an apocalyptic number.

20718996480 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 20718996480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46608912672).

20718996480 is an abundant number, since it is smaller than the sum of its proper divisors (72498828864).

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

20718996480 is an equidigital number, since it uses as much as digits as its factorization.

20718996480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 20718996480 in words is "twenty billion, seven hundred eighteen million, nine hundred ninety-six thousand, four hundred eighty".