20988020280 has 64 divisors (see below), whose sum is σ = 62983942560. Its totient is φ = 5595038208.

The previous prime is 20988020279. The next prime is 20988020357. The reversal of 20988020280 is 8202088902.

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 15 ways as a sum of consecutive naturals, for example, 378834 + ... + 430686.

Almost surely, 2^20988020280 is an apocalyptic number.

20988020280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20988020280 is an abundant number, since it is smaller than the sum of its proper divisors (41995922280).

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

20988020280 is a wasteful number, since it uses less digits than its factorization.

20988020280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55240 (or 55236 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 20988020280 in words is "twenty billion, nine hundred eighty-eight million, twenty thousand, two hundred eighty".