1919620345 has 24 divisors (see below), whose sum is σ = 2395096704. Its totient is φ = 1476917568.

The previous prime is 1919620343. The next prime is 1919620361. The reversal of 1919620345 is 5430269191.

It is not a de Polignac number, because 1919620345 - 2¹ = 1919620343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1919620298 and 1919620307.

It is not an unprimeable number, because it can be changed into a prime (1919620343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1290192 + ... + 1291678.

It is an arithmetic number, because the mean of its divisors is an integer number (99795696).

Almost surely, 2^1919620345 is an apocalyptic number.

It is an amenable number.

1919620345 is a deficient number, since it is larger than the sum of its proper divisors (475476359).

1919620345 is a wasteful number, since it uses less digits than its factorization.

1919620345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 1919620345 is about 43813.4721860754. The cubic root of 1919620345 is about 1242.8110750120.

The spelling of 1919620345 in words is "one billion, nine hundred nineteen million, six hundred twenty thousand, three hundred forty-five".