20121550672757 has 4 divisors (see below), whose sum is σ = 20210191865376. Its totient is φ = 20032909480140.

The previous prime is 20121550672739. The next prime is 20121550672813. The reversal of 20121550672757 is 75727605512102.

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 20121550672757 - 2¹⁴ = 20121550656373 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 (20121550642757) 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, 44320595969 + ... + 44320596422.

It is an arithmetic number, because the mean of its divisors is an integer number (5052547966344).

Almost surely, 2^{20121550672757} is an apocalyptic number.

It is an amenable number.

20121550672757 is a deficient number, since it is larger than the sum of its proper divisors (88641192619).

20121550672757 is an equidigital number, since it uses as much as digits as its factorization.

20121550672757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88641192618.

The product of its (nonzero) digits is 2058000, while the sum is 50.

The spelling of 20121550672757 in words is "twenty trillion, one hundred twenty-one billion, five hundred fifty million, six hundred seventy-two thousand, seven hundred fifty-seven".