19789057 has 4 divisors (see below), whose sum is σ = 19883056. Its totient is φ = 19695060.

The previous prime is 19789027. The next prime is 19789069. The reversal of 19789057 is 75098791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19789057 - 2⁷ = 19788929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19788998 and 19789016.

It is not an unprimeable number, because it can be changed into a prime (19789027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46683 + ... + 47104.

It is an arithmetic number, because the mean of its divisors is an integer number (4970764).

Almost surely, 2^19789057 is an apocalyptic number.

It is an amenable number.

19789057 is a deficient number, since it is larger than the sum of its proper divisors (93999).

19789057 is an equidigital number, since it uses as much as digits as its factorization.

19789057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93998.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 19789057 is about 4448.4892941312. The cubic root of 19789057 is about 270.4840744437.

The spelling of 19789057 in words is "nineteen million, seven hundred eighty-nine thousand, fifty-seven".