18954740 has 24 divisors (see below), whose sum is σ = 45491712. Its totient is φ = 6498720.

The previous prime is 18954739. The next prime is 18954743. The reversal of 18954740 is 4745981.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18954694 and 18954703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18954743) 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, 67556 + ... + 67835.

It is an arithmetic number, because the mean of its divisors is an integer number (1895488).

Almost surely, 2^18954740 is an apocalyptic number.

18954740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18954740 is an abundant number, since it is smaller than the sum of its proper divisors (26536972).

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

18954740 is a wasteful number, since it uses less digits than its factorization.

18954740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135407 (or 135405 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 18954740 is about 4353.7041700143. The cubic root of 18954740 is about 266.6281159550.

The spelling of 18954740 in words is "eighteen million, nine hundred fifty-four thousand, seven hundred forty".