20298235888 has 30 divisors (see below), whose sum is σ = 45748704336. Its totient is φ = 8699243616.

The previous prime is 20298235813. The next prime is 20298235889. The reversal of 20298235888 is 88853289202.

It is a happy number.

It is a super-2 number, since 2×20298235888² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20298235889) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 12944520 + ... + 12946087.

Almost surely, 2^20298235888 is an apocalyptic number.

20298235888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20298235888 is an abundant number, since it is smaller than the sum of its proper divisors (25450468448).

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

20298235888 is a wasteful number, since it uses less digits than its factorization.

20298235888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25890629 (or 25890616 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 20298235888 in words is "twenty billion, two hundred ninety-eight million, two hundred thirty-five thousand, eight hundred eighty-eight".