19083028421 has 2 divisors, whose sum is σ = 19083028422. Its totient is φ = 19083028420.

The previous prime is 19083028403. The next prime is 19083028451. The reversal of 19083028421 is 12482038091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14949952900 + 4133075521 = 122270^2 + 64289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19083028421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19083028451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9541514210 + 9541514211.

It is an arithmetic number, because the mean of its divisors is an integer number (9541514211).

Almost surely, 2^19083028421 is an apocalyptic number.

It is an amenable number.

19083028421 is a deficient number, since it is larger than the sum of its proper divisors (1).

19083028421 is an equidigital number, since it uses as much as digits as its factorization.

19083028421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 19083028421 in words is "nineteen billion, eighty-three million, twenty-eight thousand, four hundred twenty-one".