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18425104971 = 3713184736541
BaseRepresentation
bin10001001010001110…
…001100101001001011
31202120002002022102020
4101022032030221023
5300213311324341
612244145535523
71221406544130
oct211216145113
952502068366
1018425104971
1178a5545089
1236a26445a3
131978321aa0
14c6b088587
1572c87a566
hex44a38ca4b

18425104971 has 32 divisors (see below), whose sum is σ = 30253267968. Its totient is φ = 9713208960.

The previous prime is 18425104967. The next prime is 18425104987. The reversal of 18425104971 is 17940152481.

It is not a de Polignac number, because 18425104971 - 22 = 18425104967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18425104921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485961 + ... + 522501.

It is an arithmetic number, because the mean of its divisors is an integer number (945414624).

Almost surely, 218425104971 is an apocalyptic number.

18425104971 is a deficient number, since it is larger than the sum of its proper divisors (11828162997).

18425104971 is a wasteful number, since it uses less digits than its factorization.

18425104971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38411.

The product of its (nonzero) digits is 80640, while the sum is 42.

It can be divided in two parts, 1842510 and 4971, that added together give a palindrome (1847481).

The spelling of 18425104971 in words is "eighteen billion, four hundred twenty-five million, one hundred four thousand, nine hundred seventy-one".

Divisors: 1 3 7 13 21 39 91 273 1847 5541 12929 24011 36541 38787 72033 109623 168077 255787 475033 504231 767361 1425099 3325231 9975693 67491227 202473681 472438589 877385951 1417315767 2632157853 6141701657 18425104971