20787757478010 has 96 divisors (see below), whose sum is σ = 56171539936512. Its totient is φ = 5531376962880.

The previous prime is 20787757478009. The next prime is 20787757478011. The reversal of 20787757478010 is 1087475778702.

20787757478010 is a `hidden beast` number, since 2 + 0 + 7 + 87 + 75 + 7 + 478 + 0 + 10 = 666.

It is an interprime number because it is at equal distance from previous prime (20787757478009) and next prime (20787757478011).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20787757478011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8158114 + ... + 10398573.

It is an arithmetic number, because the mean of its divisors is an integer number (585120207672).

Almost surely, 2^{20787757478010} is an apocalyptic number.

20787757478010 is an abundant number, since it is smaller than the sum of its proper divisors (35383782458502).

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

20787757478010 is a wasteful number, since it uses less digits than its factorization.

20787757478010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18557170 (or 18557158 counting only the distinct ones).

The product of its (nonzero) digits is 43025920, while the sum is 63.

The spelling of 20787757478010 in words is "twenty trillion, seven hundred eighty-seven billion, seven hundred fifty-seven million, four hundred seventy-eight thousand, ten".