220023656400 has 60 divisors (see below), whose sum is σ = 704809116512. Its totient is φ = 58672974720.

The previous prime is 220023656317. The next prime is 220023656423. The reversal of 220023656400 is 4656320022.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91675324 + ... + 91677723.

Almost surely, 2^220023656400 is an apocalyptic number.

220023656400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220023656400 is an abundant number, since it is smaller than the sum of its proper divisors (484785460112).

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

220023656400 is a wasteful number, since it uses less digits than its factorization.

220023656400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183353068 (or 183353057 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 220023656400 its reverse (4656320022), we get a palindrome (224679976422).

The spelling of 220023656400 in words is "two hundred twenty billion, twenty-three million, six hundred fifty-six thousand, four hundred".