19842057 has 16 divisors (see below), whose sum is σ = 29801280. Its totient is φ = 13045536.

The previous prime is 19842007. The next prime is 19842071. The reversal of 19842057 is 75024891.

It is not a de Polignac number, because 19842057 - 2⁶ = 19841993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19842007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3063 + ... + 7004.

It is an arithmetic number, because the mean of its divisors is an integer number (1862580).

Almost surely, 2^19842057 is an apocalyptic number.

It is an amenable number.

19842057 is a deficient number, since it is larger than the sum of its proper divisors (9959223).

19842057 is a wasteful number, since it uses less digits than its factorization.

19842057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10149 (or 10143 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 19842057 is about 4454.4423893457. The cubic root of 19842057 is about 270.7253336542.

The spelling of 19842057 in words is "nineteen million, eight hundred forty-two thousand, fifty-seven".