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20478611159 is a prime number
BaseRepresentation
bin10011000100100111…
…101100111011010111
31221212012010020022222
4103010213230323113
5313420011024114
613224023412555
71323323215466
oct230447547327
957765106288
1020478611159
118759707736
123b762b415b
131c148b13c6
14dc3ab09dd
157eccab98e
hex4c49eced7

20478611159 has 2 divisors, whose sum is σ = 20478611160. Its totient is φ = 20478611158.

The previous prime is 20478611147. The next prime is 20478611183. The reversal of 20478611159 is 95111687402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20478611159 - 220 = 20477562583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20478611359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10239305579 + 10239305580.

It is an arithmetic number, because the mean of its divisors is an integer number (10239305580).

Almost surely, 220478611159 is an apocalyptic number.

20478611159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20478611159 is an equidigital number, since it uses as much as digits as its factorization.

20478611159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 20478611159 in words is "twenty billion, four hundred seventy-eight million, six hundred eleven thousand, one hundred fifty-nine".