20461556341 has 4 divisors (see below), whose sum is σ = 20462160172. Its totient is φ = 20460952512.

The previous prime is 20461556333. The next prime is 20461556351. The reversal of 20461556341 is 14365516402.

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 12736025316 + 7725531025 = 112854^2 + 87895^2 .

It is a cyclic number.

It is not a de Polignac number, because 20461556341 - 2³ = 20461556333 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 20461556341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461556351) 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, 247860 + ... + 319933.

It is an arithmetic number, because the mean of its divisors is an integer number (5115540043).

Almost surely, 2^20461556341 is an apocalyptic number.

It is an amenable number.

20461556341 is a deficient number, since it is larger than the sum of its proper divisors (603831).

20461556341 is an equidigital number, since it uses as much as digits as its factorization.

20461556341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603830.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 20461556341 in words is "twenty billion, four hundred sixty-one million, five hundred fifty-six thousand, three hundred forty-one".