20005121151 has 16 divisors (see below), whose sum is σ = 29639887200. Its totient is φ = 13335545664.

The previous prime is 20005121119. The next prime is 20005121173. The reversal of 20005121151 is 15112150002.

20005121151 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 512 + 1 + 151 = 666.

It is not a de Polignac number, because 20005121151 - 2⁵ = 20005121119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005121251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353185 + ... + 405893.

It is an arithmetic number, because the mean of its divisors is an integer number (1852492950).

Almost surely, 2^20005121151 is an apocalyptic number.

20005121151 is a deficient number, since it is larger than the sum of its proper divisors (9634766049).

20005121151 is a wasteful number, since it uses less digits than its factorization.

20005121151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66775 (or 66769 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

Adding to 20005121151 its reverse (15112150002), we get a palindrome (35117271153).

The spelling of 20005121151 in words is "twenty billion, five million, one hundred twenty-one thousand, one hundred fifty-one".