19980996 has 48 divisors (see below), whose sum is σ = 53975040. Its totient is φ = 5634720.

The previous prime is 19980973. The next prime is 19981007. The reversal of 19980996 is 69908991.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5131 + ... + 8141.

It is an arithmetic number, because the mean of its divisors is an integer number (1124480).

Almost surely, 2^19980996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19980996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26987520).

19980996 is an abundant number, since it is smaller than the sum of its proper divisors (33994044).

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

19980996 is a wasteful number, since it uses less digits than its factorization.

19980996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104 (or 3102 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 19980996 is about 4470.0107382421. The cubic root of 19980996 is about 271.3557597601.

The spelling of 19980996 in words is "nineteen million, nine hundred eighty thousand, nine hundred ninety-six".