20494826128 has 80 divisors (see below), whose sum is σ = 47049238656. Its totient is φ = 8465863680.

The previous prime is 20494826123. The next prime is 20494826129. The reversal of 20494826128 is 82162849402.

It is not an unprimeable number, because it can be changed into a prime (20494826123) 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, 354250 + ... + 408022.

Almost surely, 2^20494826128 is an apocalyptic number.

20494826128 is a gapful number since it is divisible by the number (28) 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 20494826128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23524619328).

20494826128 is an abundant number, since it is smaller than the sum of its proper divisors (26554412528).

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

20494826128 is a wasteful number, since it uses less digits than its factorization.

20494826128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53912 (or 53906 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 20494826128 in words is "twenty billion, four hundred ninety-four million, eight hundred twenty-six thousand, one hundred twenty-eight".