18949950 has 60 divisors (see below), whose sum is σ = 52664040. Its totient is φ = 5052240.

The previous prime is 18949949. The next prime is 18949993. The reversal of 18949950 is 5994981.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 18949896 and 18949905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1711 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (877734).

Almost surely, 2^18949950 is an apocalyptic number.

18949950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18949950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26332020).

18949950 is an abundant number, since it is smaller than the sum of its proper divisors (33714090).

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

18949950 is a wasteful number, since it uses less digits than its factorization.

18949950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703 (or 4689 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 18949950 is about 4353.1540289772. The cubic root of 18949950 is about 266.6056544445.

The spelling of 18949950 in words is "eighteen million, nine hundred forty-nine thousand, nine hundred fifty".