19776896 has 32 divisors (see below), whose sum is σ = 39600480. Its totient is φ = 9838080.

The previous prime is 19776893. The next prime is 19776901. The reversal of 19776896 is 69867791.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×19776896² = 782251230789632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19776893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46766 + ... + 47186.

It is an arithmetic number, because the mean of its divisors is an integer number (1237515).

Almost surely, 2^19776896 is an apocalyptic number.

19776896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19776896 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

19776896 is an equidigital number, since it uses as much as digits as its factorization.

19776896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 790 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 53.

The square root of 19776896 is about 4447.1222155457. The cubic root of 19776896 is about 270.4286560903.

The spelling of 19776896 in words is "nineteen million, seven hundred seventy-six thousand, eight hundred ninety-six".