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20787934107 = 36929311369
BaseRepresentation
bin10011010111000011…
…101011001110011011
31222122202011110122110
4103113003223032123
5320033202342412
613314433323403
71334100344613
oct232703531633
958582143573
1020787934107
1188a8279636
124041a06563
131c639c4835
141012bcda43
1581a00cd3c
hex4d70eb39b

20787934107 has 4 divisors (see below), whose sum is σ = 27717245480. Its totient is φ = 13858622736.

The previous prime is 20787934099. The next prime is 20787934117. The reversal of 20787934107 is 70143978702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20787934107 - 23 = 20787934099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20787934117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3464655682 + ... + 3464655687.

It is an arithmetic number, because the mean of its divisors is an integer number (6929311370).

Almost surely, 220787934107 is an apocalyptic number.

20787934107 is a deficient number, since it is larger than the sum of its proper divisors (6929311373).

20787934107 is an equidigital number, since it uses as much as digits as its factorization.

20787934107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6929311372.

The product of its (nonzero) digits is 592704, while the sum is 48.

The spelling of 20787934107 in words is "twenty billion, seven hundred eighty-seven million, nine hundred thirty-four thousand, one hundred seven".

Divisors: 1 3 6929311369 20787934107