18932115450 has 72 divisors (see below), whose sum is σ = 49876084512. Its totient is φ = 4751578880.

The previous prime is 18932115439. The next prime is 18932115457. The reversal of 18932115450 is 5451123981.

It is a junction number, because it is equal to n+sod(n) for n = 18932115399 and 18932115408.

It is not an unprimeable number, because it can be changed into a prime (18932115457) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 175014 + ... + 261713.

It is an arithmetic number, because the mean of its divisors is an integer number (692723396).

Almost surely, 2^18932115450 is an apocalyptic number.

18932115450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18932115450 is an abundant number, since it is smaller than the sum of its proper divisors (30943969062).

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

18932115450 is a wasteful number, since it uses less digits than its factorization.

18932115450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436776 (or 436754 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 18932115450 in words is "eighteen billion, nine hundred thirty-two million, one hundred fifteen thousand, four hundred fifty".