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19301933 = 723197131
BaseRepresentation
bin100100110100…
…0011000101101
31100022122021102
41021220120231
514420130213
61525412445
7323030600
oct111503055
940278242
1019301933
11a993912
12656a125
133cca781
1427c6337
151a64158
hex126862d

19301933 has 24 divisors (see below), whose sum is σ = 23595264. Its totient is φ = 15724800.

The previous prime is 19301927. The next prime is 19301959. The reversal of 19301933 is 33910391.

It is not a de Polignac number, because 19301933 - 214 = 19285549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19301896 and 19301905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19301903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147278 + ... + 147408.

It is an arithmetic number, because the mean of its divisors is an integer number (983136).

Almost surely, 219301933 is an apocalyptic number.

It is an amenable number.

19301933 is a deficient number, since it is larger than the sum of its proper divisors (4293331).

19301933 is a wasteful number, since it uses less digits than its factorization.

19301933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 29.

The square root of 19301933 is about 4393.3965220544. The cubic root of 19301933 is about 268.2462141043.

The spelling of 19301933 in words is "nineteen million, three hundred one thousand, nine hundred thirty-three".

Divisors: 1 7 31 49 97 131 217 679 917 1519 3007 4061 4753 6419 12707 21049 28427 88949 147343 198989 393917 622643 2757419 19301933