20826740767488 has 144 divisors (see below), whose sum is σ = 55896347055360. Its totient is φ = 6883899052032.

The previous prime is 20826740767487. The next prime is 20826740767493. The reversal of 20826740767488 is 88476704762802.

It is a super-2 number, since 2×20826740767488² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20826740767487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87738370 + ... + 87975422.

Almost surely, 2^{20826740767488} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20826740767488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27948173527680).

20826740767488 is an abundant number, since it is smaller than the sum of its proper divisors (35069606287872).

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

20826740767488 is a wasteful number, since it uses less digits than its factorization.

20826740767488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238034 (or 238020 counting only the distinct ones).

The product of its (nonzero) digits is 404619264, while the sum is 69.

The spelling of 20826740767488 in words is "twenty trillion, eight hundred twenty-six billion, seven hundred forty million, seven hundred sixty-seven thousand, four hundred eighty-eight".