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19420970 = 2517234967
BaseRepresentation
bin100101000010…
…1011100101010
31100112200120012
41022011130222
514432432340
61532131522
7324034622
oct112053452
940480505
1019420970
11aa65298
126606ba2
13403c9ca
142817882
151a89565
hex128572a

19420970 has 32 divisors (see below), whose sum is σ = 38631168. Its totient is φ = 6992128.

The previous prime is 19420943. The next prime is 19420979. The reversal of 19420970 is 7902491.

It is not an unprimeable number, because it can be changed into a prime (19420979) 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 15 ways as a sum of consecutive naturals, for example, 1427 + ... + 6393.

It is an arithmetic number, because the mean of its divisors is an integer number (1207224).

Almost surely, 219420970 is an apocalyptic number.

19420970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19420970 is a deficient number, since it is larger than the sum of its proper divisors (19210198).

19420970 is a wasteful number, since it uses less digits than its factorization.

19420970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5014.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 19420970 is about 4406.9229627939. The cubic root of 19420970 is about 268.7965183583.

The spelling of 19420970 in words is "nineteen million, four hundred twenty thousand, nine hundred seventy".

Divisors: 1 2 5 10 17 23 34 46 85 115 170 230 391 782 1955 3910 4967 9934 24835 49670 84439 114241 168878 228482 422195 571205 844390 1142410 1942097 3884194 9710485 19420970