22505163421 has 8 divisors (see below), whose sum is σ = 24262431480. Its totient is φ = 20751624192.

The previous prime is 22505163409. The next prime is 22505163427. The reversal of 22505163421 is 12436150522.

It can be written as a sum of positive squares in 4 ways, for example, as 3663396 + 22501500025 = 1914^2 + 150005^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22505163421 - 2¹⁷ = 22505032349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22505163427) 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 7 ways as a sum of consecutive naturals, for example, 919660 + ... + 943813.

It is an arithmetic number, because the mean of its divisors is an integer number (3032803935).

Almost surely, 2^22505163421 is an apocalyptic number.

It is an amenable number.

22505163421 is a deficient number, since it is larger than the sum of its proper divisors (1757268059).

22505163421 is a wasteful number, since it uses less digits than its factorization.

22505163421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864415.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 22505163421 in words is "twenty-two billion, five hundred five million, one hundred sixty-three thousand, four hundred twenty-one".