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20311671371 = 157272947407
BaseRepresentation
bin10010111010101010…
…111000001001001011
31221102112222210222212
4102322222320021023
5313044241440441
613155301335335
71316225233535
oct227252701113
957375883885
1020311671371
118683455372
123b2a40754b
131bb9130c74
14da9856855
157dd2d2eeb
hex4baab824b

20311671371 has 8 divisors (see below), whose sum is σ = 20448966720. Its totient is φ = 20174476608.

The previous prime is 20311671343. The next prime is 20311671397. The reversal of 20311671371 is 17317611302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20311671371 - 222 = 20307477067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311671271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404750 + ... + 452156.

It is an arithmetic number, because the mean of its divisors is an integer number (2556120840).

Almost surely, 220311671371 is an apocalyptic number.

20311671371 is a deficient number, since it is larger than the sum of its proper divisors (137295349).

20311671371 is a wasteful number, since it uses less digits than its factorization.

20311671371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50293.

The product of its (nonzero) digits is 5292, while the sum is 32.

The spelling of 20311671371 in words is "twenty billion, three hundred eleven million, six hundred seventy-one thousand, three hundred seventy-one".

Divisors: 1 157 2729 47407 428453 7442899 129373703 20311671371