20744277760 has 144 divisors (see below), whose sum is σ = 52161931584. Its totient is φ = 7889125376.

The previous prime is 20744277739. The next prime is 20744277779. The reversal of 20744277760 is 6777244702.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 20744277760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5091084 + ... + 5095156.

It is an arithmetic number, because the mean of its divisors is an integer number (362235636).

Almost surely, 2^20744277760 is an apocalyptic number.

20744277760 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 20744277760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26080965792).

20744277760 is an abundant number, since it is smaller than the sum of its proper divisors (31417653824).

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

20744277760 is a wasteful number, since it uses less digits than its factorization.

20744277760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290 (or 4276 counting only the distinct ones).

The product of its (nonzero) digits is 921984, while the sum is 46.

The spelling of 20744277760 in words is "twenty billion, seven hundred forty-four million, two hundred seventy-seven thousand, seven hundred sixty".