19710945 has 24 divisors (see below), whose sum is σ = 35433216. Its totient is φ = 10511856.

The previous prime is 19710941. The next prime is 19710959. The reversal of 19710945 is 54901791.

It is not a de Polignac number, because 19710945 - 2² = 19710941 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19710941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6897 + ... + 9326.

It is an arithmetic number, because the mean of its divisors is an integer number (1476384).

Almost surely, 2^19710945 is an apocalyptic number.

19710945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19710945 is a deficient number, since it is larger than the sum of its proper divisors (15722271).

19710945 is an equidigital number, since it uses as much as digits as its factorization.

19710945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16243 (or 16231 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 19710945 is about 4439.7010034461. The cubic root of 19710945 is about 270.1277173545.

The spelling of 19710945 in words is "nineteen million, seven hundred ten thousand, nine hundred forty-five".