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20452361 = 179114259
BaseRepresentation
bin100111000000…
…1010000001001
31102111002100212
41032001100021
520213433421
62010210505
7335561606
oct116012011
942432325
1020452361
11105aa186
126a23a35
1343112b7
142a056ad
151bdee5b
hex1381409

20452361 has 4 divisors (see below), whose sum is σ = 20566800. Its totient is φ = 20337924.

The previous prime is 20452357. The next prime is 20452363. The reversal of 20452361 is 16325402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16325402 = 28162701.

It is a cyclic number.

It is not a de Polignac number, because 20452361 - 22 = 20452357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20452363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56951 + ... + 57308.

It is an arithmetic number, because the mean of its divisors is an integer number (5141700).

Almost surely, 220452361 is an apocalyptic number.

It is an amenable number.

20452361 is a deficient number, since it is larger than the sum of its proper divisors (114439).

20452361 is a wasteful number, since it uses less digits than its factorization.

20452361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114438.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20452361 is about 4522.4286616817. The cubic root of 20452361 is about 273.4730178690.

Adding to 20452361 its reverse (16325402), we get a palindrome (36777763).

The spelling of 20452361 in words is "twenty million, four hundred fifty-two thousand, three hundred sixty-one".

Divisors: 1 179 114259 20452361