19894434 has 32 divisors (see below), whose sum is σ = 45741696. Its totient is φ = 5650560.

The previous prime is 19894421. The next prime is 19894447. The reversal of 19894434 is 43449891.

It is an interprime number because it is at equal distance from previous prime (19894421) and next prime (19894447).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6294 + ... + 8910.

It is an arithmetic number, because the mean of its divisors is an integer number (1429428).

Almost surely, 2^19894434 is an apocalyptic number.

19894434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19894434 is an abundant number, since it is smaller than the sum of its proper divisors (25847262).

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

19894434 is a wasteful number, since it uses less digits than its factorization.

19894434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810.

The product of its digits is 124416, while the sum is 42.

The square root of 19894434 is about 4460.3177016890. The cubic root of 19894434 is about 270.9633352266.

It can be divided in two parts, 19 and 894434, that added together give a triangular number (894453 = T₁₃₃₇).

The spelling of 19894434 in words is "nineteen million, eight hundred ninety-four thousand, four hundred thirty-four".