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19946919 = 331214483
BaseRepresentation
bin100110000010…
…1110110100111
31101112102000210
41030011312213
520101300134
61551310503
7331355166
oct114056647
941472023
1019946919
1110294463
12681b433
134195215
1429133dd
151b402e9
hex1305da7

19946919 has 8 divisors (see below), whose sum is σ = 27453952. Its totient is φ = 12868920.

The previous prime is 19946909. The next prime is 19946923. The reversal of 19946919 is 91964991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19946919 - 25 = 19946887 is a prime.

It is a super-2 number, since 2×199469192 = 795759155185122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19946909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107149 + ... + 107334.

It is an arithmetic number, because the mean of its divisors is an integer number (3431744).

Almost surely, 219946919 is an apocalyptic number.

19946919 is a deficient number, since it is larger than the sum of its proper divisors (7507033).

19946919 is a wasteful number, since it uses less digits than its factorization.

19946919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214517.

The product of its digits is 157464, while the sum is 48.

The square root of 19946919 is about 4466.1973758445. The cubic root of 19946919 is about 271.2014088953.

The spelling of 19946919 in words is "nineteen million, nine hundred forty-six thousand, nine hundred nineteen".

Divisors: 1 3 31 93 214483 643449 6648973 19946919