20420212132 has 12 divisors (see below), whose sum is σ = 35738167500. Its totient is φ = 10209307136.

The previous prime is 20420212081. The next prime is 20420212181. The reversal of 20420212132 is 23121202402.

It can be written as a sum of positive squares in 2 ways, for example, as 15561564516 + 4858647616 = 124746^2 + 69704^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140257 + ... + 245992.

It is an arithmetic number, because the mean of its divisors is an integer number (2978180625).

Almost surely, 2^20420212132 is an apocalyptic number.

It is an amenable number.

20420212132 is a deficient number, since it is larger than the sum of its proper divisors (15317955368).

20420212132 is a wasteful number, since it uses less digits than its factorization.

20420212132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399470 (or 399468 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20420212132 its reverse (23121202402), we get a palindrome (43541414534).

The spelling of 20420212132 in words is "twenty billion, four hundred twenty million, two hundred twelve thousand, one hundred thirty-two".