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18868953 = 37698179
BaseRepresentation
bin100011111111…
…0101011011001
31022111122100010
41013332223121
514312301303
61512232133
7316245345
oct107765331
938448303
1018868953
11a718584
12639b649
133ba867c
142712625
1519cac03

18868953 has 8 divisors (see below), whose sum is σ = 25194400. Its totient is φ = 12561408.

The previous prime is 18868939. The next prime is 18868961. The reversal of 18868953 is 35986881.

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

It is not a de Polignac number, because 18868953 - 28 = 18868697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18868973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1783 + ... + 6396.

It is an arithmetic number, because the mean of its divisors is an integer number (3149300).

Almost surely, 218868953 is an apocalyptic number.

It is an amenable number.

18868953 is a deficient number, since it is larger than the sum of its proper divisors (6325447).

18868953 is an equidigital number, since it uses as much as digits as its factorization.

18868953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8951.

The product of its digits is 414720, while the sum is 48.

The square root of 18868953 is about 4343.8408120004. The cubic root of 18868953 is about 266.2252647347.

The spelling of 18868953 in words is "eighteen million, eight hundred sixty-eight thousand, nine hundred fifty-three".

Divisors: 1 3 769 2307 8179 24537 6289651 18868953