18741906 has 48 divisors (see below), whose sum is σ = 42254784. Its totient is φ = 5998752.

The previous prime is 18741901. The next prime is 18741911. The reversal of 18741906 is 60914781.

It is an interprime number because it is at equal distance from previous prime (18741901) and next prime (18741911).

It is not an unprimeable number, because it can be changed into a prime (18741901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71131 + ... + 71393.

It is an arithmetic number, because the mean of its divisors is an integer number (880308).

Almost surely, 2^18741906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18741906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21127392).

18741906 is an abundant number, since it is smaller than the sum of its proper divisors (23512878).

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

18741906 is a wasteful number, since it uses less digits than its factorization.

18741906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18741906 is about 4329.1923034210. The cubic root of 18741906 is about 265.6264094227.

The spelling of 18741906 in words is "eighteen million, seven hundred forty-one thousand, nine hundred six".