20381020743 has 4 divisors (see below), whose sum is σ = 27174694328. Its totient is φ = 13587347160.

The previous prime is 20381020727. The next prime is 20381020753. The reversal of 20381020743 is 34702018302.

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

It is not a de Polignac number, because 20381020743 - 2⁴ = 20381020727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20381020743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381020753) 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, 3396836788 + ... + 3396836793.

It is an arithmetic number, because the mean of its divisors is an integer number (6793673582).

Almost surely, 2^20381020743 is an apocalyptic number.

20381020743 is a deficient number, since it is larger than the sum of its proper divisors (6793673585).

20381020743 is an equidigital number, since it uses as much as digits as its factorization.

20381020743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6793673584.

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 20381020743 in words is "twenty billion, three hundred eighty-one million, twenty thousand, seven hundred forty-three".