18859740 has 24 divisors (see below), whose sum is σ = 52807440. Its totient is φ = 5029248.

The previous prime is 18859739. The next prime is 18859741. The reversal of 18859740 is 4795881.

It is an interprime number because it is at equal distance from previous prime (18859739) and next prime (18859741).

It is a junction number, because it is equal to n+sod(n) for n = 18859692 and 18859701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18859741) 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, 157105 + ... + 157224.

It is an arithmetic number, because the mean of its divisors is an integer number (2200310).

Almost surely, 2^18859740 is an apocalyptic number.

18859740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18859740 is an abundant number, since it is smaller than the sum of its proper divisors (33947700).

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

18859740 is a wasteful number, since it uses less digits than its factorization.

18859740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314341 (or 314339 counting only the distinct ones).

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

The square root of 18859740 is about 4342.7802154841. The cubic root of 18859740 is about 266.1819284198.

The spelling of 18859740 in words is "eighteen million, eight hundred fifty-nine thousand, seven hundred forty".