20998426608 has 40 divisors (see below), whose sum is σ = 60273262800. Its totient is φ = 6999475392.

The previous prime is 20998426597. The next prime is 20998426649. The reversal of 20998426608 is 80662489902.

It is a happy number.

20998426608 is a `hidden beast` number, since 2 + 0 + 9 + 9 + 8 + 4 + 26 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24303303 + ... + 24304166.

It is an arithmetic number, because the mean of its divisors is an integer number (1506831570).

Almost surely, 2^20998426608 is an apocalyptic number.

It is an amenable number.

20998426608 is an abundant number, since it is smaller than the sum of its proper divisors (39274836192).

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

20998426608 is a wasteful number, since it uses less digits than its factorization.

20998426608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48607486 (or 48607474 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 20998426608 in words is "twenty billion, nine hundred ninety-eight million, four hundred twenty-six thousand, six hundred eight".