20840675760 has 160 divisors (see below), whose sum is σ = 71966554560. Its totient is φ = 5543424000.

The previous prime is 20840675731. The next prime is 20840675761. The reversal of 20840675760 is 6757604802.

It is a super-2 number, since 2×20840675760² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (20840675761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 854130 + ... + 878190.

It is an arithmetic number, because the mean of its divisors is an integer number (449790966).

Almost surely, 2^20840675760 is an apocalyptic number.

20840675760 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 20840675760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35983277280).

20840675760 is an abundant number, since it is smaller than the sum of its proper divisors (51125878800).

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

20840675760 is a wasteful number, since it uses less digits than its factorization.

20840675760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24484 (or 24472 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 20840675760 in words is "twenty billion, eight hundred forty million, six hundred seventy-five thousand, seven hundred sixty".