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19939995 = 32571792
BaseRepresentation
bin100110000010…
…0001010011011
31101112001112100
41030010022123
520101034440
61551214443
7331326045
oct114041233
941461470
1019939995
111028a239
126817423
13419201a
142910a95
151b3d230
hex130429b

19939995 has 36 divisors (see below), whose sum is σ = 35498736. Its totient is φ = 10352160.

The previous prime is 19939993. The next prime is 19940017. The reversal of 19939995 is 59993991.

It is a happy number.

It is not a de Polignac number, because 19939995 - 21 = 19939993 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (19939993) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 252366 + ... + 252444.

It is an arithmetic number, because the mean of its divisors is an integer number (986076).

Almost surely, 219939995 is an apocalyptic number.

19939995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19939995 is a deficient number, since it is larger than the sum of its proper divisors (15558741).

19939995 is an equidigital number, since it uses as much as digits as its factorization.

19939995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 158 counting only the distinct ones).

The product of its digits is 885735, while the sum is 54.

The square root of 19939995 is about 4465.4221524958. The cubic root of 19939995 is about 271.1700253373.

The spelling of 19939995 in words is "nineteen million, nine hundred thirty-nine thousand, nine hundred ninety-five".

Divisors: 1 3 5 9 15 45 71 79 213 237 355 395 639 711 1065 1185 3195 3555 5609 6241 16827 18723 28045 31205 50481 56169 84135 93615 252405 280845 443111 1329333 2215555 3987999 6646665 19939995