20030121847 has 2 divisors, whose sum is σ = 20030121848. Its totient is φ = 20030121846.

The previous prime is 20030121809. The next prime is 20030121877. The reversal of 20030121847 is 74812103002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20030121847 - 2⁷ = 20030121719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20030121877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015060923 + 10015060924.

It is an arithmetic number, because the mean of its divisors is an integer number (10015060924).

Almost surely, 2^20030121847 is an apocalyptic number.

20030121847 is a deficient number, since it is larger than the sum of its proper divisors (1).

20030121847 is an equidigital number, since it uses as much as digits as its factorization.

20030121847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 20030121847 its reverse (74812103002), we get a palindrome (94842224849).

The spelling of 20030121847 in words is "twenty billion, thirty million, one hundred twenty-one thousand, eight hundred forty-seven".