18954940 has 12 divisors (see below), whose sum is σ = 39805416. Its totient is φ = 7581968.

The previous prime is 18954917. The next prime is 18954979. The reversal of 18954940 is 4945981.

It is a junction number, because it is equal to n+sod(n) for n = 18954893 and 18954902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473854 + ... + 473893.

It is an arithmetic number, because the mean of its divisors is an integer number (3317118).

Almost surely, 2^18954940 is an apocalyptic number.

18954940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18954940 is an abundant number, since it is smaller than the sum of its proper divisors (20850476).

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

18954940 is a wasteful number, since it uses less digits than its factorization.

18954940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947756 (or 947754 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18954940 is about 4353.7271389006. The cubic root of 18954940 is about 266.6290537228.

The spelling of 18954940 in words is "eighteen million, nine hundred fifty-four thousand, nine hundred forty".