19894742 has 16 divisors (see below), whose sum is σ = 34165152. Its totient is φ = 8511360.

The previous prime is 19894711. The next prime is 19894753. The reversal of 19894742 is 24749891.

It is a junction number, because it is equal to n+sod(n) for n = 19894693 and 19894702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11528 + ... + 13140.

It is an arithmetic number, because the mean of its divisors is an integer number (2135322).

Almost surely, 2^19894742 is an apocalyptic number.

19894742 is a deficient number, since it is larger than the sum of its proper divisors (14270410).

19894742 is a wasteful number, since it uses less digits than its factorization.

19894742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503.

The product of its digits is 145152, while the sum is 44.

The square root of 19894742 is about 4460.3522282439. The cubic root of 19894742 is about 270.9647335453.

The spelling of 19894742 in words is "nineteen million, eight hundred ninety-four thousand, seven hundred forty-two".