20147871743 has 4 divisors (see below), whose sum is σ = 20158877328. Its totient is φ = 20136866160.

The previous prime is 20147871673. The next prime is 20147871749. The reversal of 20147871743 is 34717874102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20147871743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20147871694 and 20147871703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147871749) 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, 5500046 + ... + 5503707.

It is an arithmetic number, because the mean of its divisors is an integer number (5039719332).

Almost surely, 2^20147871743 is an apocalyptic number.

20147871743 is a deficient number, since it is larger than the sum of its proper divisors (11005585).

20147871743 is a wasteful number, since it uses less digits than its factorization.

20147871743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11005584.

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 20147871743 in words is "twenty billion, one hundred forty-seven million, eight hundred seventy-one thousand, seven hundred forty-three".