31644432130 has 16 divisors (see below), whose sum is σ = 58171893120. Its totient is φ = 12388458352.

The previous prime is 31644432101. The next prime is 31644432137. The reversal of 31644432130 is 3123444613.

It is a junction number, because it is equal to n+sod(n) for n = 31644432092 and 31644432101.

It is not an unprimeable number, because it can be changed into a prime (31644432137) 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 7 ways as a sum of consecutive naturals, for example, 33663820 + ... + 33664759.

It is an arithmetic number, because the mean of its divisors is an integer number (3635743320).

Almost surely, 2^31644432130 is an apocalyptic number.

31644432130 is a deficient number, since it is larger than the sum of its proper divisors (26527460990).

31644432130 is a wasteful number, since it uses less digits than its factorization.

31644432130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67328633.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 31644432130 its reverse (3123444613), we get a palindrome (34767876743).

The spelling of 31644432130 in words is "thirty-one billion, six hundred forty-four million, four hundred thirty-two thousand, one hundred thirty".