20830457998 has 64 divisors (see below), whose sum is σ = 38264979456. Its totient is φ = 8316432000.

The previous prime is 20830457993. The next prime is 20830458017. The reversal of 20830457998 is 89975403802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20830457993) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1235908 + ... + 1252648.

It is an arithmetic number, because the mean of its divisors is an integer number (597890304).

Almost surely, 2^20830457998 is an apocalyptic number.

20830457998 is a deficient number, since it is larger than the sum of its proper divisors (17434521458).

20830457998 is a wasteful number, since it uses less digits than its factorization.

20830457998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16889.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 20830457998 in words is "twenty billion, eight hundred thirty million, four hundred fifty-seven thousand, nine hundred ninety-eight".