19218672 has 90 divisors (see below), whose sum is σ = 59173296. Its totient is φ = 5818560.

The previous prime is 19218649. The next prime is 19218673. The reversal of 19218672 is 27681291.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19218673) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16873 + ... + 17975.

Almost surely, 2^19218672 is an apocalyptic number.

19218672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19218672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29586648).

19218672 is an abundant number, since it is smaller than the sum of its proper divisors (39954624).

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

19218672 is a wasteful number, since it uses less digits than its factorization.

19218672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1119 counting only the distinct ones).

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

The square root of 19218672 is about 4383.9105830297. The cubic root of 19218672 is about 267.8599550486.

The spelling of 19218672 in words is "nineteen million, two hundred eighteen thousand, six hundred seventy-two".