20830457518 has 32 divisors (see below), whose sum is σ = 35707392000. Its totient is φ = 9040174176.

The previous prime is 20830457497. The next prime is 20830457521. The reversal of 20830457518 is 81575403802.

It is a congruent number.

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, 259918 + ... + 330481.

It is an arithmetic number, because the mean of its divisors is an integer number (1115856000).

Almost surely, 2^20830457518 is an apocalyptic number.

20830457518 is a deficient number, since it is larger than the sum of its proper divisors (14876934482).

20830457518 is a wasteful number, since it uses less digits than its factorization.

20830457518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590496.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 20830457518 in words is "twenty billion, eight hundred thirty million, four hundred fifty-seven thousand, five hundred eighteen".