19847442 has 16 divisors (see below), whose sum is σ = 40540032. Its totient is φ = 6474960.

The previous prime is 19847431. The next prime is 19847453. The reversal of 19847442 is 24474891.

It is an interprime number because it is at equal distance from previous prime (19847431) and next prime (19847453).

It is a self number, because there is not a number n which added to its sum of digits gives 19847442.

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, 34909 + ... + 35472.

It is an arithmetic number, because the mean of its divisors is an integer number (2533752).

Almost surely, 2^19847442 is an apocalyptic number.

19847442 is an abundant number, since it is smaller than the sum of its proper divisors (20692590).

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

19847442 is a wasteful number, since it uses less digits than its factorization.

19847442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70433.

The product of its digits is 64512, while the sum is 39.

The square root of 19847442 is about 4455.0468011010. The cubic root of 19847442 is about 270.7498224468.

The spelling of 19847442 in words is "nineteen million, eight hundred forty-seven thousand, four hundred forty-two".