20934885830 has 16 divisors (see below), whose sum is σ = 38559139344. Its totient is φ = 8179211040.

The previous prime is 20934885827. The next prime is 20934885877. The reversal of 20934885830 is 3858843902.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24342461 + ... + 24343320.

It is an arithmetic number, because the mean of its divisors is an integer number (2409946209).

Almost surely, 2^20934885830 is an apocalyptic number.

20934885830 is a deficient number, since it is larger than the sum of its proper divisors (17624253514).

20934885830 is a wasteful number, since it uses less digits than its factorization.

20934885830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48685831.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 20934885830 in words is "twenty billion, nine hundred thirty-four million, eight hundred eighty-five thousand, eight hundred thirty".