20284655312 has 20 divisors (see below), whose sum is σ = 39649324260. Its totient is φ = 10052571648.

The previous prime is 20284655311. The next prime is 20284655359. The reversal of 20284655312 is 21355648202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 348344896 + 19936310416 = 18664^2 + 141196^2 .

It is a super-2 number, since 2×20284655312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284655311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5607887 + ... + 5611502.

It is an arithmetic number, because the mean of its divisors is an integer number (1982466213).

Almost surely, 2^20284655312 is an apocalyptic number.

It is an amenable number.

20284655312 is a deficient number, since it is larger than the sum of its proper divisors (19364668948).

20284655312 is a wasteful number, since it uses less digits than its factorization.

20284655312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11219510 (or 11219504 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 20284655312 in words is "twenty billion, two hundred eighty-four million, six hundred fifty-five thousand, three hundred twelve".