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BaseRepresentation
bin100101000010…
…1011100100101
31100112200120000
41022011130211
514432432330
61532131513
7324034614
oct112053445
940480500
1019420965
11aa65293
126606b99
13403c9c5
14281787b
151a89560
hex1285725

19420965 has 40 divisors (see below), whose sum is σ = 35312640. Its totient is φ = 10209888.

The previous prime is 19420943. The next prime is 19420979. The reversal of 19420965 is 56902491.

It is not a de Polignac number, because 19420965 - 27 = 19420837 is a prime.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 31692 + ... + 32298.

It is an arithmetic number, because the mean of its divisors is an integer number (882816).

Almost surely, 219420965 is an apocalyptic number.

19420965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19420965 is a deficient number, since it is larger than the sum of its proper divisors (15891675).

19420965 is an equidigital number, since it uses as much as digits as its factorization.

19420965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 19420965 is about 4406.9223955046. The cubic root of 19420965 is about 268.7964952907.

The spelling of 19420965 in words is "nineteen million, four hundred twenty thousand, nine hundred sixty-five".