20437513743 has 4 divisors (see below), whose sum is σ = 27250018328. Its totient is φ = 13625009160.

The previous prime is 20437513727. The next prime is 20437513753. The reversal of 20437513743 is 34731573402.

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

It is not a de Polignac number, because 20437513743 - 2⁴ = 20437513727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20437513703) 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 3 ways as a sum of consecutive naturals, for example, 3406252288 + ... + 3406252293.

It is an arithmetic number, because the mean of its divisors is an integer number (6812504582).

Almost surely, 2^20437513743 is an apocalyptic number.

20437513743 is a deficient number, since it is larger than the sum of its proper divisors (6812504585).

20437513743 is an equidigital number, since it uses as much as digits as its factorization.

20437513743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6812504584.

The product of its (nonzero) digits is 211680, while the sum is 39.

The spelling of 20437513743 in words is "twenty billion, four hundred thirty-seven million, five hundred thirteen thousand, seven hundred forty-three".