220236858436 has 27 divisors (see below), whose sum is σ = 448352694237. Its totient is φ = 94384409280.

The previous prime is 220236858421. The next prime is 220236858451. The reversal of 220236858436 is 634858632022.

The square root of 220236858436 is 469294.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (220236858421) and next prime (220236858451).

It can be written as a sum of positive squares in only one way, i.e., 61259220036 + 158977638400 = 247506^2 + 398720^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 220236858436.

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, 6553356 + ... + 6586876.

Almost surely, 2^220236858436 is an apocalyptic number.

220236858436 is the 469294-th square number.

It is an amenable number.

220236858436 is an abundant number, since it is smaller than the sum of its proper divisors (228115835801).

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

220236858436 is an frugal number, since it uses more digits than its factorization.

220236858436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67060 (or 33530 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 49.

Multiplying 220236858436 by its sum of digits (49), we get a square (10791606063364 = 3285058²).

220236858436 divided by its sum of digits (49) gives a square (4494629764 = 67042²).

The spelling of 220236858436 in words is "two hundred twenty billion, two hundred thirty-six million, eight hundred fifty-eight thousand, four hundred thirty-six".