20042122461 has 16 divisors (see below), whose sum is σ = 26933040000. Its totient is φ = 13256516288.

The previous prime is 20042122391. The next prime is 20042122483. The reversal of 20042122461 is 16422124002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20042122461 - 2²⁷ = 19907904733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042124461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371215 + ... + 421763.

It is an arithmetic number, because the mean of its divisors is an integer number (1683315000).

Almost surely, 2^20042122461 is an apocalyptic number.

It is an amenable number.

20042122461 is a deficient number, since it is larger than the sum of its proper divisors (6890917539).

20042122461 is a wasteful number, since it uses less digits than its factorization.

20042122461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51588.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 20042122461 its reverse (16422124002), we get a palindrome (36464246463).

The spelling of 20042122461 in words is "twenty billion, forty-two million, one hundred twenty-two thousand, four hundred sixty-one".