20373699739 has 4 divisors (see below), whose sum is σ = 20374316424. Its totient is φ = 20373083056.

The previous prime is 20373699733. The next prime is 20373699761. The reversal of 20373699739 is 93799637302.

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

It is a cyclic number.

It is not a de Polignac number, because 20373699739 - 2¹¹ = 20373697691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20373699733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255802 + ... + 325855.

It is an arithmetic number, because the mean of its divisors is an integer number (5093579106).

Almost surely, 2^20373699739 is an apocalyptic number.

20373699739 is a deficient number, since it is larger than the sum of its proper divisors (616685).

20373699739 is an equidigital number, since it uses as much as digits as its factorization.

20373699739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616684.

The product of its (nonzero) digits is 11573604, while the sum is 58.

It can be divided in two parts, 2037 and 3699739, that added together give a square (3701776 = 1924²).

The spelling of 20373699739 in words is "twenty billion, three hundred seventy-three million, six hundred ninety-nine thousand, seven hundred thirty-nine".