19211996 has 12 divisors (see below), whose sum is σ = 33816552. Its totient is φ = 9550128.

The previous prime is 19211987. The next prime is 19212001. The reversal of 19211996 is 69911291.

19211996 is nontrivially palindromic in base 5.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13190 + ... + 14573.

It is an arithmetic number, because the mean of its divisors is an integer number (2818046).

Almost surely, 2^19211996 is an apocalyptic number.

It is an amenable number.

19211996 is a deficient number, since it is larger than the sum of its proper divisors (14604556).

19211996 is a wasteful number, since it uses less digits than its factorization.

19211996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27940 (or 27938 counting only the distinct ones).

The product of its digits is 8748, while the sum is 38.

The square root of 19211996 is about 4383.1490962549. The cubic root of 19211996 is about 267.8289359064.

The spelling of 19211996 in words is "nineteen million, two hundred eleven thousand, nine hundred ninety-six".