20122461 has 6 divisors (see below), whose sum is σ = 29065790. Its totient is φ = 13414968.

The previous prime is 20122429. The next prime is 20122469. The reversal of 20122461 is 16422102.

20122461 is a `hidden beast` number, since 201 + 2 + 2 + 461 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10850436 + 9272025 = 3294^2 + 3045^2 .

It is not a de Polignac number, because 20122461 - 2⁵ = 20122429 is a prime.

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 (20122469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117906 + ... + 1117923.

Almost surely, 2^20122461 is an apocalyptic number.

It is an amenable number.

20122461 is a deficient number, since it is larger than the sum of its proper divisors (8943329).

20122461 is a wasteful number, since it uses less digits than its factorization.

20122461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235835 (or 2235832 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20122461 is about 4485.8066164292. The cubic root of 20122461 is about 271.9946518917.

Adding to 20122461 its reverse (16422102), we get a palindrome (36544563).

The spelling of 20122461 in words is "twenty million, one hundred twenty-two thousand, four hundred sixty-one".