20137506450757 has 4 divisors (see below), whose sum is σ = 20153251179520. Its totient is φ = 20121761721996.

The previous prime is 20137506450739. The next prime is 20137506450793. The reversal of 20137506450757 is 75705460573102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20137506450757 - 2¹⁵ = 20137506417989 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 (20137506450707) 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, 7872362463 + ... + 7872365020.

It is an arithmetic number, because the mean of its divisors is an integer number (5038312794880).

Almost surely, 2^{20137506450757} is an apocalyptic number.

It is an amenable number.

20137506450757 is a deficient number, since it is larger than the sum of its proper divisors (15744728763).

20137506450757 is a wasteful number, since it uses less digits than its factorization.

20137506450757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15744728762.

The product of its (nonzero) digits is 6174000, while the sum is 52.

The spelling of 20137506450757 in words is "twenty trillion, one hundred thirty-seven billion, five hundred six million, four hundred fifty thousand, seven hundred fifty-seven".