19842402 has 8 divisors (see below), whose sum is σ = 39684816. Its totient is φ = 6614132.

The previous prime is 19842391. The next prime is 19842443. The reversal of 19842402 is 20424891.

It is a sphenic number, since it is the product of 3 distinct primes.

19842402 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 19842402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653528 + ... + 1653539.

It is an arithmetic number, because the mean of its divisors is an integer number (4960602).

Almost surely, 2^19842402 is an apocalyptic number.

19842402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19842402 is a wasteful number, since it uses less digits than its factorization.

19842402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307072.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 19842402 is about 4454.4811145632. The cubic root of 19842402 is about 270.7269027069.

The spelling of 19842402 in words is "nineteen million, eight hundred forty-two thousand, four hundred two".