19700427 has 4 divisors (see below), whose sum is σ = 26267240. Its totient is φ = 13133616.

The previous prime is 19700363. The next prime is 19700449. The reversal of 19700427 is 72400791.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19700427 - 2⁶ = 19700363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19700394 and 19700403.

It is not an unprimeable number, because it can be changed into a prime (19700027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3283402 + ... + 3283407.

It is an arithmetic number, because the mean of its divisors is an integer number (6566810).

Almost surely, 2^19700427 is an apocalyptic number.

19700427 is a deficient number, since it is larger than the sum of its proper divisors (6566813).

19700427 is an equidigital number, since it uses as much as digits as its factorization.

19700427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6566812.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 19700427 is about 4438.5163061546. The cubic root of 19700427 is about 270.0796609938.

The spelling of 19700427 in words is "nineteen million, seven hundred thousand, four hundred twenty-seven".