19814988 has 24 divisors (see below), whose sum is σ = 46695600. Its totient is φ = 6539200.

The previous prime is 19814987. The next prime is 19814989. The reversal of 19814988 is 88941891.

It is an interprime number because it is at equal distance from previous prime (19814987) and next prime (19814989).

It is not an unprimeable number, because it can be changed into a prime (19814981) 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, 6963 + ... + 9386.

It is an arithmetic number, because the mean of its divisors is an integer number (1945650).

Almost surely, 2^19814988 is an apocalyptic number.

It is an amenable number.

19814988 is an abundant number, since it is smaller than the sum of its proper divisors (26880612).

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

19814988 is a wasteful number, since it uses less digits than its factorization.

19814988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16457 (or 16455 counting only the distinct ones).

The product of its digits is 165888, while the sum is 48.

The square root of 19814988 is about 4451.4029249215. The cubic root of 19814988 is about 270.6021676766.

It can be divided in two parts, 19814 and 988, that added together give a palindrome (20802).

The spelling of 19814988 in words is "nineteen million, eight hundred fourteen thousand, nine hundred eighty-eight".