19776834 has 96 divisors (see below), whose sum is σ = 56309760. Its totient is φ = 4860000.

The previous prime is 19776817. The next prime is 19776839. The reversal of 19776834 is 43867791.

It is a super-2 number, since 2×19776834² = 782246326127112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19776834.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19776839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25959 + ... + 26709.

It is an arithmetic number, because the mean of its divisors is an integer number (586560).

Almost surely, 2^19776834 is an apocalyptic number.

19776834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19776834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28154880).

19776834 is an abundant number, since it is smaller than the sum of its proper divisors (36532926).

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

19776834 is a wasteful number, since it uses less digits than its factorization.

19776834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 793 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 19776834 is about 4447.1152447401. The cubic root of 19776834 is about 270.4283734946.

The spelling of 19776834 in words is "nineteen million, seven hundred seventy-six thousand, eight hundred thirty-four".