18659254020 has 384 divisors, whose sum is σ = 61039706112. Its totient is φ = 4216665600.

The previous prime is 18659254007. The next prime is 18659254021. The reversal of 18659254020 is 2045295681.

It is not an unprimeable number, because it can be changed into a prime (18659254021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 111731977 + ... + 111732143.

It is an arithmetic number, because the mean of its divisors is an integer number (158957568).

Almost surely, 2^18659254020 is an apocalyptic number.

18659254020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18659254020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30519853056).

18659254020 is an abundant number, since it is smaller than the sum of its proper divisors (42380452092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18659254020 is a wasteful number, since it uses less digits than its factorization.

18659254020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 18659254020 in words is "eighteen billion, six hundred fifty-nine million, two hundred fifty-four thousand, twenty".