20122417504251 has 12 divisors (see below), whose sum is σ = 29542201291200. Its totient is φ = 13195027871280.

The previous prime is 20122417504247. The next prime is 20122417504309. The reversal of 20122417504251 is 15240571422102.

20122417504251 is a `hidden beast` number, since 2 + 0 + 1 + 224 + 1 + 7 + 5 + 0 + 425 + 1 = 666.

It is not a de Polignac number, because 20122417504251 - 2² = 20122417504247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20122417502251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18326427051 + ... + 18326428148.

It is an arithmetic number, because the mean of its divisors is an integer number (2461850107600).

Almost surely, 2^{20122417504251} is an apocalyptic number.

20122417504251 is a deficient number, since it is larger than the sum of its proper divisors (9419783786949).

20122417504251 is a wasteful number, since it uses less digits than its factorization.

20122417504251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36652855266 (or 36652855263 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

Adding to 20122417504251 its reverse (15240571422102), we get a palindrome (35362988926353).

The spelling of 20122417504251 in words is "twenty trillion, one hundred twenty-two billion, four hundred seventeen million, five hundred four thousand, two hundred fifty-one".