20630250121 has 4 divisors (see below), whose sum is σ = 22217192452. Its totient is φ = 19043307792.

The previous prime is 20630250101. The next prime is 20630250149. The reversal of 20630250121 is 12105203602.

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 5653385721 + 14976864400 = 75189^2 + 122380^2 .

It is a cyclic number.

It is not a de Polignac number, because 20630250121 - 2¹⁹ = 20629725833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20630250092 and 20630250101.

It is not an unprimeable number, because it can be changed into a prime (20630250101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793471146 + ... + 793471171.

It is an arithmetic number, because the mean of its divisors is an integer number (5554298113).

Almost surely, 2^20630250121 is an apocalyptic number.

It is an amenable number.

20630250121 is a deficient number, since it is larger than the sum of its proper divisors (1586942331).

20630250121 is a wasteful number, since it uses less digits than its factorization.

20630250121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586942330.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20630250121 its reverse (12105203602), we get a palindrome (32735453723).

The spelling of 20630250121 in words is "twenty billion, six hundred thirty million, two hundred fifty thousand, one hundred twenty-one".