20345362527261 has 4 divisors (see below), whose sum is σ = 27127150036352. Its totient is φ = 13563575018172.

The previous prime is 20345362527229. The next prime is 20345362527283. The reversal of 20345362527261 is 16272526354302.

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 not a de Polignac number, because 20345362527261 - 2⁵ = 20345362527229 is a prime.

It is a super-2 number, since 2×20345362527261² (a number of 27 digits) contains 22 as substring.

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 20345362527261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345363527261) 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, 3390893754541 + ... + 3390893754546.

It is an arithmetic number, because the mean of its divisors is an integer number (6781787509088).

Almost surely, 2^{20345362527261} is an apocalyptic number.

It is an amenable number.

20345362527261 is a deficient number, since it is larger than the sum of its proper divisors (6781787509091).

20345362527261 is an equidigital number, since it uses as much as digits as its factorization.

20345362527261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781787509090.

The product of its (nonzero) digits is 3628800, while the sum is 48.

The spelling of 20345362527261 in words is "twenty trillion, three hundred forty-five billion, three hundred sixty-two million, five hundred twenty-seven thousand, two hundred sixty-one".