20402213332 has 12 divisors (see below), whose sum is σ = 37804101300. Its totient is φ = 9601041536.

The previous prime is 20402213329. The next prime is 20402213353. The reversal of 20402213332 is 23331220402.

It can be written as a sum of positive squares in 2 ways, for example, as 10558795536 + 9843417796 = 102756^2 + 99214^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150016207 + ... + 150016342.

It is an arithmetic number, because the mean of its divisors is an integer number (3150341775).

Almost surely, 2^20402213332 is an apocalyptic number.

It is an amenable number.

20402213332 is a deficient number, since it is larger than the sum of its proper divisors (17401887968).

20402213332 is a wasteful number, since it uses less digits than its factorization.

20402213332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300032570 (or 300032568 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20402213332 its reverse (23331220402), we get a palindrome (43733433734).

The spelling of 20402213332 in words is "twenty billion, four hundred two million, two hundred thirteen thousand, three hundred thirty-two".