20456998926 has 384 divisors, whose sum is σ = 58163857920. Its totient is φ = 4723826688.

The previous prime is 20456998879. The next prime is 20456999027. The reversal of 20456998926 is 62989965402.

It is a self number, because there is not a number n which added to its sum of digits gives 20456998926.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 90118825 + ... + 90119051.

It is an arithmetic number, because the mean of its divisors is an integer number (151468380).

Almost surely, 2^20456998926 is an apocalyptic number.

20456998926 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 20456998926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29081928960).

20456998926 is an abundant number, since it is smaller than the sum of its proper divisors (37706858994).

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

20456998926 is a wasteful number, since it uses less digits than its factorization.

20456998926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 60.

The spelling of 20456998926 in words is "twenty billion, four hundred fifty-six million, nine hundred ninety-eight thousand, nine hundred twenty-six".