20988205875 has 192 divisors, whose sum is σ = 46771845120. Its totient is φ = 8817465600.

The previous prime is 20988205817. The next prime is 20988205883. The reversal of 20988205875 is 57850288902.

It is not a de Polignac number, because 20988205875 - 2¹¹ = 20988203827 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 44942392 + ... + 44942858.

It is an arithmetic number, because the mean of its divisors is an integer number (243603360).

Almost surely, 2^20988205875 is an apocalyptic number.

20988205875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20988205875 is an abundant number, since it is smaller than the sum of its proper divisors (25783639245).

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

20988205875 is a wasteful number, since it uses less digits than its factorization.

20988205875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 20988205875 in words is "twenty billion, nine hundred eighty-eight million, two hundred five thousand, eight hundred seventy-five".