20287223219232 has 72 divisors (see below), whose sum is σ = 57701221266780. Its totient is φ = 6761302364160.

The previous prime is 20287223219209. The next prime is 20287223219233. The reversal of 20287223219232 is 23291232278202.

20287223219232 is a `hidden beast` number, since 2 + 0 + 28 + 72 + 2 + 321 + 9 + 232 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20263286178576 + 23937040656 = 4501476^2 + 154716^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (20287223219233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3991257 + ... + 7516952.

Almost surely, 2^{20287223219232} is an apocalyptic number.

It is an amenable number.

20287223219232 is an abundant number, since it is smaller than the sum of its proper divisors (37413998047548).

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

20287223219232 is a wasteful number, since it uses less digits than its factorization.

20287223219232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11514346 (or 11514335 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 20287223219232 in words is "twenty trillion, two hundred eighty-seven billion, two hundred twenty-three million, two hundred nineteen thousand, two hundred thirty-two".