Search a number
-
+
19305923 = 713353601
BaseRepresentation
bin100100110100…
…1010111000011
31100022211202012
41021221113003
514420242143
61525443135
7323045330
oct111512703
940284665
1019305923
11a99690a
1265704ab
133ccc530
1427c7987
151a65418
hex12695c3

19305923 has 16 divisors (see below), whose sum is σ = 23868096. Its totient is φ = 15206400.

The previous prime is 19305917. The next prime is 19305929. The reversal of 19305923 is 32950391.

It is an interprime number because it is at equal distance from previous prime (19305917) and next prime (19305929).

It is a cyclic number.

It is not a de Polignac number, because 19305923 - 210 = 19304899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19305923.

It is not an unprimeable number, because it can be changed into a prime (19305929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31823 + ... + 32423.

It is an arithmetic number, because the mean of its divisors is an integer number (1491756).

Almost surely, 219305923 is an apocalyptic number.

19305923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19305923 is a deficient number, since it is larger than the sum of its proper divisors (4562173).

19305923 is a wasteful number, since it uses less digits than its factorization.

19305923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 19305923 is about 4393.8505891757. The cubic root of 19305923 is about 268.2646963405.

The spelling of 19305923 in words is "nineteen million, three hundred five thousand, nine hundred twenty-three".

Divisors: 1 7 13 91 353 601 2471 4207 4589 7813 32123 54691 212153 1485071 2757989 19305923