20219808726 has 96 divisors (see below), whose sum is σ = 47842546752. Its totient is φ = 6134572800.

The previous prime is 20219808709. The next prime is 20219808727. The reversal of 20219808726 is 62780891202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20219808727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6214116 + ... + 6217368.

It is an arithmetic number, because the mean of its divisors is an integer number (498359862).

Almost surely, 2^20219808726 is an apocalyptic number.

20219808726 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20219808726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23921273376).

20219808726 is an abundant number, since it is smaller than the sum of its proper divisors (27622738026).

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

20219808726 is a wasteful number, since it uses less digits than its factorization.

20219808726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638 (or 3635 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 20219808726 in words is "twenty billion, two hundred nineteen million, eight hundred eight thousand, seven hundred twenty-six".