31697020234 has 32 divisors (see below), whose sum is σ = 54932898816. Its totient is φ = 13556766720.

The previous prime is 31697020219. The next prime is 31697020273. The reversal of 31697020234 is 43202079613.

It is a junction number, because it is equal to n+sod(n) for n = 31697020193 and 31697020202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1918999 + ... + 1935445.

It is an arithmetic number, because the mean of its divisors is an integer number (1716653088).

Almost surely, 2^31697020234 is an apocalyptic number.

31697020234 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31697020234 is a deficient number, since it is larger than the sum of its proper divisors (23235878582).

31697020234 is a wasteful number, since it uses less digits than its factorization.

31697020234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21630.

The product of its (nonzero) digits is 54432, while the sum is 37.

Adding to 31697020234 its reverse (43202079613), we get a palindrome (74899099847).

The spelling of 31697020234 in words is "thirty-one billion, six hundred ninety-seven million, twenty thousand, two hundred thirty-four".