20312202132 has 72 divisors (see below), whose sum is σ = 53519714976. Its totient is φ = 6489388224.

The previous prime is 20312202121. The next prime is 20312202133. The reversal of 20312202132 is 23120221302.

20312202132 is a `hidden beast` number, since 20 + 312 + 202 + 132 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312202133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24558 + ... + 203045.

Almost surely, 2^20312202132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312202132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26759857488).

20312202132 is an abundant number, since it is smaller than the sum of its proper divisors (33207512844).

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

20312202132 is a wasteful number, since it uses less digits than its factorization.

20312202132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227717 (or 227712 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20312202132 its reverse (23120221302), we get a palindrome (43432423434).

The spelling of 20312202132 in words is "twenty billion, three hundred twelve million, two hundred two thousand, one hundred thirty-two".