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20005555405 = 5114711816553
BaseRepresentation
bin10010101000011011…
…001000110011001101
31220122012222111211111
4102220123020303031
5311432410233110
613105044252021
71305520262263
oct225033106315
956565874744
1020005555405
118536683970
123a639a1011
131b6a8a1464
14d7ad30433
157c14b6e8a
hex4a86c8ccd

20005555405 has 32 divisors (see below), whose sum is σ = 26773037568. Its totient is φ = 14225702400.

The previous prime is 20005555363. The next prime is 20005555417. The reversal of 20005555405 is 50455550002.

It is not a de Polignac number, because 20005555405 - 27 = 20005555277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3049609 + ... + 3056161.

It is an arithmetic number, because the mean of its divisors is an integer number (836657424).

Almost surely, 220005555405 is an apocalyptic number.

It is an amenable number.

20005555405 is a deficient number, since it is larger than the sum of its proper divisors (6767482163).

20005555405 is a wasteful number, since it uses less digits than its factorization.

20005555405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7797.

The product of its (nonzero) digits is 25000, while the sum is 31.

The spelling of 20005555405 in words is "twenty billion, five million, five hundred fifty-five thousand, four hundred five".

Divisors: 1 5 11 47 55 235 517 1181 2585 5905 6553 12991 32765 55507 64955 72083 277535 307991 360415 610577 1539955 3052885 3387901 7739093 16939505 38695465 85130023 363737371 425650115 1818686855 4001111081 20005555405