20168835743 has 36 divisors (see below), whose sum is σ = 24139187184. Its totient is φ = 16497744000.

The previous prime is 20168835727. The next prime is 20168835773. The reversal of 20168835743 is 34753886102.

It is not a de Polignac number, because 20168835743 - 2⁴ = 20168835727 is a prime.

It is a super-2 number, since 2×20168835743² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168835703) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 199691393 + ... + 199691493.

Almost surely, 2^20168835743 is an apocalyptic number.

20168835743 is a deficient number, since it is larger than the sum of its proper divisors (3970351441).

20168835743 is an frugal number, since it uses more digits than its factorization.

20168835743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 20168835743 in words is "twenty billion, one hundred sixty-eight million, eight hundred thirty-five thousand, seven hundred forty-three".