20712565823236 has 27 divisors (see below), whose sum is σ = 42164995847079. Its totient is φ = 8876786617608.

The previous prime is 20712565823231. The next prime is 20712565823237. The reversal of 20712565823236 is 63232856521702.

The square root of 20712565823236 is 4551106.

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

It is not an unprimeable number, because it can be changed into a prime (20712565823231) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63552945 + ... + 63878023.

Almost surely, 2^{20712565823236} is an apocalyptic number.

20712565823236 is the 4551106-th square number.

It is an amenable number.

20712565823236 is an abundant number, since it is smaller than the sum of its proper divisors (21452430023843).

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

20712565823236 is an frugal number, since it uses more digits than its factorization.

20712565823236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650176 (or 325088 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 52.

The spelling of 20712565823236 in words is "twenty trillion, seven hundred twelve billion, five hundred sixty-five million, eight hundred twenty-three thousand, two hundred thirty-six".