20299097856 has 144 divisors (see below), whose sum is σ = 57301332480. Its totient is φ = 6365736960.

The previous prime is 20299097851. The next prime is 20299097857. The reversal of 20299097856 is 65879099202.

It is a junction number, because it is equal to n+sod(n) for n = 20299097796 and 20299097805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20299097851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1068085 + ... + 1086923.

It is an arithmetic number, because the mean of its divisors is an integer number (397925920).

Almost surely, 2^20299097856 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 20299097856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28650666240).

20299097856 is an abundant number, since it is smaller than the sum of its proper divisors (37002234624).

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

20299097856 is a wasteful number, since it uses less digits than its factorization.

20299097856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18942 (or 18928 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 57.

The spelling of 20299097856 in words is "twenty billion, two hundred ninety-nine million, ninety-seven thousand, eight hundred fifty-six".