20931625834 has 16 divisors (see below), whose sum is σ = 35911824768. Its totient is φ = 8963437392.

The previous prime is 20931625817. The next prime is 20931625877. The reversal of 20931625834 is 43852613902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587014 + ... + 621649.

It is an arithmetic number, because the mean of its divisors is an integer number (2244489048).

Almost surely, 2^20931625834 is an apocalyptic number.

20931625834 is a deficient number, since it is larger than the sum of its proper divisors (14980198934).

20931625834 is a wasteful number, since it uses less digits than its factorization.

20931625834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209909.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 20931625834 in words is "twenty billion, nine hundred thirty-one million, six hundred twenty-five thousand, eight hundred thirty-four".