19902996 has 60 divisors (see below), whose sum is σ = 53178048. Its totient is φ = 6488208.

The previous prime is 19902991. The next prime is 19903007. The reversal of 19902996 is 69920991.

It is a happy number.

It is a super-2 number, since 2×19902996² = 792258499552032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19902991) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14575 + ... + 15881.

Almost surely, 2^19902996 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 19902996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26589024).

19902996 is an abundant number, since it is smaller than the sum of its proper divisors (33275052).

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

19902996 is a wasteful number, since it uses less digits than its factorization.

19902996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 19902996 is about 4461.2773955449. The cubic root of 19902996 is about 271.0022012956.

The spelling of 19902996 in words is "nineteen million, nine hundred two thousand, nine hundred ninety-six".