20372077237 has 4 divisors (see below), whose sum is σ = 20376765900. Its totient is φ = 20367388576.

The previous prime is 20372077189. The next prime is 20372077241. The reversal of 20372077237 is 73277027302.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 487129041 + 19884948196 = 22071^2 + 141014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20372077237 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 20372077237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20372077637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2337808 + ... + 2346505.

It is an arithmetic number, because the mean of its divisors is an integer number (5094191475).

Almost surely, 2^20372077237 is an apocalyptic number.

It is an amenable number.

20372077237 is a deficient number, since it is larger than the sum of its proper divisors (4688663).

20372077237 is an equidigital number, since it uses as much as digits as its factorization.

20372077237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4688662.

The product of its (nonzero) digits is 172872, while the sum is 40.

The spelling of 20372077237 in words is "twenty billion, three hundred seventy-two million, seventy-seven thousand, two hundred thirty-seven".