18978054 has 16 divisors (see below), whose sum is σ = 38001648. Its totient is φ = 6318432.

The previous prime is 18978053. The next prime is 18978067. The reversal of 18978054 is 45087981.

It is a junction number, because it is equal to n+sod(n) for n = 18977997 and 18978015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18978053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6144 + ... + 8700.

It is an arithmetic number, because the mean of its divisors is an integer number (2375103).

Almost surely, 2^18978054 is an apocalyptic number.

18978054 is an abundant number, since it is smaller than the sum of its proper divisors (19023594).

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

18978054 is a wasteful number, since it uses less digits than its factorization.

18978054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 18978054 is about 4356.3808373465. The cubic root of 18978054 is about 266.7373871459.

The spelling of 18978054 in words is "eighteen million, nine hundred seventy-eight thousand, fifty-four".