220635400436 has 24 divisors (see below), whose sum is σ = 421241830464. Its totient is φ = 100281962880.

The previous prime is 220635400423. The next prime is 220635400451. The reversal of 220635400436 is 634004536022.

It is a junction number, because it is equal to n+sod(n) for n = 220635400396 and 220635400405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510041 + ... + 837503.

It is an arithmetic number, because the mean of its divisors is an integer number (17551742936).

Almost surely, 2^220635400436 is an apocalyptic number.

It is an amenable number.

220635400436 is a deficient number, since it is larger than the sum of its proper divisors (200606430028).

220635400436 is a wasteful number, since it uses less digits than its factorization.

220635400436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342791 (or 342789 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 220635400436 its reverse (634004536022), we get a palindrome (854639936458).

The spelling of 220635400436 in words is "two hundred twenty billion, six hundred thirty-five million, four hundred thousand, four hundred thirty-six".