19420829 has 2 divisors, whose sum is σ = 19420830. Its totient is φ = 19420828.

The previous prime is 19420813. The next prime is 19420837. The reversal of 19420829 is 92802491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16216729 + 3204100 = 4027^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 19420829 - 2⁴ = 19420813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19420879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9710414 + 9710415.

It is an arithmetic number, because the mean of its divisors is an integer number (9710415).

Almost surely, 2^19420829 is an apocalyptic number.

It is an amenable number.

19420829 is a deficient number, since it is larger than the sum of its proper divisors (1).

19420829 is an equidigital number, since it uses as much as digits as its factorization.

19420829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 19420829 is about 4406.9069652081. The cubic root of 19420829 is about 268.7958678518.

The spelling of 19420829 in words is "nineteen million, four hundred twenty thousand, eight hundred twenty-nine".