20054220461 has 4 divisors (see below), whose sum is σ = 21877331424. Its totient is φ = 18231109500.

The previous prime is 20054220451. The next prime is 20054220479. The reversal of 20054220461 is 16402245002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20054220461 - 2¹⁸ = 20053958317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20054220461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20054220451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911555465 + ... + 911555486.

It is an arithmetic number, because the mean of its divisors is an integer number (5469332856).

Almost surely, 2^20054220461 is an apocalyptic number.

It is an amenable number.

20054220461 is a deficient number, since it is larger than the sum of its proper divisors (1823110963).

20054220461 is a wasteful number, since it uses less digits than its factorization.

20054220461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823110962.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 20054220461 its reverse (16402245002), we get a palindrome (36456465463).

The spelling of 20054220461 in words is "twenty billion, fifty-four million, two hundred twenty thousand, four hundred sixty-one".