20787757478022 has 16 divisors (see below), whose sum is σ = 41956941700080. Its totient is φ = 6865681368672.

The previous prime is 20787757478011. The next prime is 20787757478023. The reversal of 20787757478022 is 22087475778702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20787757478023) by changing a digit.

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, 15892780293 + ... + 15892781600.

It is an arithmetic number, because the mean of its divisors is an integer number (2622308856255).

Almost surely, 2^{20787757478022} is an apocalyptic number.

20787757478022 is an abundant number, since it is smaller than the sum of its proper divisors (21169184222058).

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

20787757478022 is a wasteful number, since it uses less digits than its factorization.

20787757478022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31785562007.

The product of its (nonzero) digits is 172103680, while the sum is 66.

The spelling of 20787757478022 in words is "twenty trillion, seven hundred eighty-seven billion, seven hundred fifty-seven million, four hundred seventy-eight thousand, twenty-two".