20266712544 has 144 divisors (see below), whose sum is σ = 57871521792. Its totient is φ = 6207312384.

The previous prime is 20266712491. The next prime is 20266712569. The reversal of 20266712544 is 44521766202.

It is a super-2 number, since 2×20266712544² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3680097 + ... + 3685599.

It is an arithmetic number, because the mean of its divisors is an integer number (401885568).

Almost surely, 2^20266712544 is an apocalyptic number.

20266712544 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 20266712544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28935760896).

20266712544 is an abundant number, since it is smaller than the sum of its proper divisors (37604809248).

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

20266712544 is a wasteful number, since it uses less digits than its factorization.

20266712544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5769 (or 5748 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 20266712544 in words is "twenty billion, two hundred sixty-six million, seven hundred twelve thousand, five hundred forty-four".