220696405938 has 18 divisors (see below), whose sum is σ = 478179864669. Its totient is φ = 73564804272.

The previous prime is 220696405849. The next prime is 220696405981. The reversal of 220696405938 is 839504696022.

It is a happy number.

220696405938 is a `hidden beast` number, since 2 + 2 + 0 + 6 + 9 + 6 + 40 + 593 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 201445675929 + 19250730009 = 448827^2 + 138747^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332187.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1937758 + ... + 2048486.

Almost surely, 2^220696405938 is an apocalyptic number.

220696405938 is an abundant number, since it is smaller than the sum of its proper divisors (257483458731).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220696405938 is an frugal number, since it uses more digits than its factorization.

220696405938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221466 (or 110734 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 220696405938 in words is "two hundred twenty billion, six hundred ninety-six million, four hundred five thousand, nine hundred thirty-eight".