19918452 has 24 divisors (see below), whose sum is σ = 47240032. Its totient is φ = 6530400.

The previous prime is 19918439. The next prime is 19918453. The reversal of 19918452 is 25481991.

It is a self number, because there is not a number n which added to its sum of digits gives 19918452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19918453) 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, 12874 + ... + 14337.

Almost surely, 2^19918452 is an apocalyptic number.

19918452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19918452 is an abundant number, since it is smaller than the sum of its proper divisors (27321580).

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

19918452 is a wasteful number, since it uses less digits than its factorization.

19918452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27279 (or 27277 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 19918452 is about 4463.0092986683. The cubic root of 19918452 is about 271.0723335552.

The spelling of 19918452 in words is "nineteen million, nine hundred eighteen thousand, four hundred fifty-two".