20213231330 has 16 divisors (see below), whose sum is σ = 36385719480. Its totient is φ = 8084869632.

The previous prime is 20213231317. The next prime is 20213231347. The reversal of 20213231330 is 3313231202.

It can be written as a sum of positive squares in 4 ways, for example, as 9959441209 + 10253790121 = 99797^2 + 101261^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 210236 + ... + 290904.

Almost surely, 2^20213231330 is an apocalyptic number.

20213231330 is a deficient number, since it is larger than the sum of its proper divisors (16172488150).

20213231330 is a wasteful number, since it uses less digits than its factorization.

20213231330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105733.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20213231330 its reverse (3313231202), we get a palindrome (23526462532).

The spelling of 20213231330 in words is "twenty billion, two hundred thirteen million, two hundred thirty-one thousand, three hundred thirty".