20942287488 has 192 divisors, whose sum is σ = 63966240000. Its totient is φ = 6553903104.

The previous prime is 20942287477. The next prime is 20942287493. The reversal of 20942287488 is 88478224902.

20942287488 is a `hidden beast` number, since 209 + 422 + 8 + 7 + 4 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

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, 9771345 + ... + 9773487.

It is an arithmetic number, because the mean of its divisors is an integer number (333157500).

Almost surely, 2^20942287488 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 20942287488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31983120000).

20942287488 is an abundant number, since it is smaller than the sum of its proper divisors (43023952512).

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

20942287488 is a wasteful number, since it uses less digits than its factorization.

20942287488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 20942287488 in words is "twenty billion, nine hundred forty-two million, two hundred eighty-seven thousand, four hundred eighty-eight".