19988696 has 32 divisors (see below), whose sum is σ = 46129440. Its totient is φ = 7907328.

The previous prime is 19988687. The next prime is 19988699. The reversal of 19988696 is 69688991.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19988699) 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, 13001 + ... + 14456.

It is an arithmetic number, because the mean of its divisors is an integer number (1441545).

Almost surely, 2^19988696 is an apocalyptic number.

It is an amenable number.

19988696 is an abundant number, since it is smaller than the sum of its proper divisors (26140744).

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

19988696 is a wasteful number, since it uses less digits than its factorization.

19988696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27483 (or 27479 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 56.

The square root of 19988696 is about 4470.8719507497. The cubic root of 19988696 is about 271.3906123939.

The spelling of 19988696 in words is "nineteen million, nine hundred eighty-eight thousand, six hundred ninety-six".