20428772002488 has 96 divisors (see below), whose sum is σ = 56694428154000. Its totient is φ = 6641505446400.

The previous prime is 20428772002477. The next prime is 20428772002537. The reversal of 20428772002488 is 88420027782402.

It is a happy number.

20428772002488 is a `hidden beast` number, since 2 + 0 + 428 + 7 + 7 + 200 + 2 + 4 + 8 + 8 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8794338 + ... + 10871886.

Almost surely, 2^{20428772002488} 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 20428772002488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28347214077000).

20428772002488 is an abundant number, since it is smaller than the sum of its proper divisors (36265656151512).

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

20428772002488 is a wasteful number, since it uses less digits than its factorization.

20428772002488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080933 (or 2080926 counting only the distinct ones).

The product of its (nonzero) digits is 6422528, while the sum is 54.

The spelling of 20428772002488 in words is "twenty trillion, four hundred twenty-eight billion, seven hundred seventy-two million, two thousand, four hundred eighty-eight".