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BaseRepresentation
bin1001011101000000001101…
…11001100111000010010010
32201121021211120010200200220
410232200012321213002102
510211041311403244114
6112113433002453510
74243603003062021
oct456400671470222
981537746120626
1020787757478034
116695047184888
1223b8981b04296
13b7a37aaa3b71
1451c1c06b48b8
15260b0d49e0a9
hex12e806e67092

20787757478034 has 16 divisors (see below), whose sum is σ = 42589551906720. Its totient is φ = 6760246334240.

The previous prime is 20787757478027. The next prime is 20787757478041. The reversal of 20787757478034 is 43087475778702.

It is an interprime number because it is at equal distance from previous prime (20787757478027) and next prime (20787757478041).

It is a self number, because there is not a number n which added to its sum of digits gives 20787757478034.

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 7 ways as a sum of consecutive naturals, for example, 42251539344 + ... + 42251539835.

It is an arithmetic number, because the mean of its divisors is an integer number (2661846994170).

Almost surely, 220787757478034 is an apocalyptic number.

20787757478034 is an abundant number, since it is smaller than the sum of its proper divisors (21801794428686).

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

20787757478034 is a wasteful number, since it uses less digits than its factorization.

20787757478034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84503079225.

The product of its (nonzero) digits is 516311040, while the sum is 69.

The spelling of 20787757478034 in words is "twenty trillion, seven hundred eighty-seven billion, seven hundred fifty-seven million, four hundred seventy-eight thousand, thirty-four".