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20142465 = 357191833
BaseRepresentation
bin100110011010…
…1100110000001
31101220100021020
41030311212001
520124024330
61555420053
7333131250
oct114654601
941810236
1020142465
1110408372
1268b4629
134233225
142964797
151b7d210
hex1335981

20142465 has 16 divisors (see below), whose sum is σ = 36832128. Its totient is φ = 9207936.

The previous prime is 20142427. The next prime is 20142481. The reversal of 20142465 is 56424102.

It is not a de Polignac number, because 20142465 - 26 = 20142401 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 95812 + ... + 96021.

It is an arithmetic number, because the mean of its divisors is an integer number (2302008).

Almost surely, 220142465 is an apocalyptic number.

It is an amenable number.

20142465 is a deficient number, since it is larger than the sum of its proper divisors (16689663).

20142465 is a wasteful number, since it uses less digits than its factorization.

20142465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191848.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20142465 is about 4488.0357618896. The cubic root of 20142465 is about 272.0847531808.

Adding to 20142465 its reverse (56424102), we get a palindrome (76566567).

The spelling of 20142465 in words is "twenty million, one hundred forty-two thousand, four hundred sixty-five".

Divisors: 1 3 5 7 15 21 35 105 191833 575499 959165 1342831 2877495 4028493 6714155 20142465