20280927744 has 960 divisors, whose sum is σ = 79359920640. Its totient is φ = 5016453120.

The previous prime is 20280927739. The next prime is 20280927749. The reversal of 20280927744 is 44772908202.

It is an interprime number because it is at equal distance from previous prime (20280927739) and next prime (20280927749).

It is a super-2 number, since 2×20280927744² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20280927744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20280927749) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 277820892 + ... + 277820964.

It is an arithmetic number, because the mean of its divisors is an integer number (82666584).

Almost surely, 2^20280927744 is an apocalyptic number.

20280927744 is a gapful number since it is divisible by the number (24) 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 20280927744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39679960320).

20280927744 is an abundant number, since it is smaller than the sum of its proper divisors (59078992896).

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

20280927744 is an equidigital number, since it uses as much as digits as its factorization.

20280927744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 20280927744 in words is "twenty billion, two hundred eighty million, nine hundred twenty-seven thousand, seven hundred forty-four".