20120743 has 2 divisors, whose sum is σ = 20120744. Its totient is φ = 20120742.

The previous prime is 20120729. The next prime is 20120759. The reversal of 20120743 is 34702102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20120743 - 2²¹ = 18023591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20120743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060371 + 10060372.

It is an arithmetic number, because the mean of its divisors is an integer number (10060372).

Almost surely, 2^20120743 is an apocalyptic number.

20120743 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120743 is an equidigital number, since it uses as much as digits as its factorization.

20120743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20120743 is about 4485.6151194680. The cubic root of 20120743 is about 271.9869109546.

Adding to 20120743 its reverse (34702102), we get a palindrome (54822845).

The spelling of 20120743 in words is "twenty million, one hundred twenty thousand, seven hundred forty-three".