18950840 has 32 divisors (see below), whose sum is σ = 42785280. Its totient is φ = 7554432.

The previous prime is 18950837. The next prime is 18950851. The reversal of 18950840 is 4805981.

It is a self number, because there is not a number n which added to its sum of digits gives 18950840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14702 + ... + 15938.

It is an arithmetic number, because the mean of its divisors is an integer number (1337040).

Almost surely, 2^18950840 is an apocalyptic number.

18950840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18950840 is an abundant number, since it is smaller than the sum of its proper divisors (23834440).

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

18950840 is a wasteful number, since it uses less digits than its factorization.

18950840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18950840 is about 4353.2562525080. The cubic root of 18950840 is about 266.6098281638.

The spelling of 18950840 in words is "eighteen million, nine hundred fifty thousand, eight hundred forty".