20550630124061 has 4 divisors (see below), whose sum is σ = 21759490719612. Its totient is φ = 19341769528512.

The previous prime is 20550630124043. The next prime is 20550630124069. The reversal of 20550630124061 is 16042103605502.

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 17924901555961 + 2625728568100 = 4233781^2 + 1620410^2 .

It is not a de Polignac number, because 20550630124061 - 2¹⁴ = 20550630107677 is a prime.

It is a super-2 number, since 2×20550630124061² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550630124069) 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, 604430297750 + ... + 604430297783.

It is an arithmetic number, because the mean of its divisors is an integer number (5439872679903).

Almost surely, 2^{20550630124061} is an apocalyptic number.

It is an amenable number.

20550630124061 is a deficient number, since it is larger than the sum of its proper divisors (1208860595551).

20550630124061 is a wasteful number, since it uses less digits than its factorization.

20550630124061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208860595550.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 20550630124061 its reverse (16042103605502), we get a palindrome (36592733729563).

The spelling of 20550630124061 in words is "twenty trillion, five hundred fifty billion, six hundred thirty million, one hundred twenty-four thousand, sixty-one".