1914930945 has 24 divisors (see below), whose sum is σ = 3338413416. Its totient is φ = 1015388928.

The previous prime is 1914930937. The next prime is 1914930947. The reversal of 1914930945 is 5490394191.

It can be written as a sum of positive squares in 4 ways, for example, as 428365809 + 1486565136 = 20697^2 + 38556^2 .

It is not a de Polignac number, because 1914930945 - 2³ = 1914930937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1914930945.

It is not an unprimeable number, because it can be changed into a prime (1914930947) 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, 115204 + ... + 130773.

It is an arithmetic number, because the mean of its divisors is an integer number (139100559).

Almost surely, 2^1914930945 is an apocalyptic number.

1914930945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1914930945 is a deficient number, since it is larger than the sum of its proper divisors (1423482471).

1914930945 is a wasteful number, since it uses less digits than its factorization.

1914930945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246161 (or 246158 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1914930945 is about 43759.9239601716. The cubic root of 1914930945 is about 1241.7982375080.

The spelling of 1914930945 in words is "one billion, nine hundred fourteen million, nine hundred thirty thousand, nine hundred forty-five".