20426256343170 has 64 divisors (see below), whose sum is σ = 55393237584000. Its totient is φ = 5354679624768.

The previous prime is 20426256343133. The next prime is 20426256343193. The reversal of 20426256343170 is 7134365262402.

20426256343170 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 6 + 2 + 5 + 634 + 3 + 1 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 31 ways as a sum of consecutive naturals, for example, 641109505 + ... + 641141364.

It is an arithmetic number, because the mean of its divisors is an integer number (865519337250).

Almost surely, 2^{20426256343170} is an apocalyptic number.

20426256343170 is an abundant number, since it is smaller than the sum of its proper divisors (34966981240830).

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

20426256343170 is a wasteful number, since it uses less digits than its factorization.

20426256343170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282250944 (or 1282250938 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The spelling of 20426256343170 in words is "twenty trillion, four hundred twenty-six billion, two hundred fifty-six million, three hundred forty-three thousand, one hundred seventy".