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20101055 = 5131718191
BaseRepresentation
bin100110010101…
…1011110111111
31101211020110112
41030223132333
520121213210
61554500235
7332566442
oct114533677
941736415
1020101055
111038a247
12689467b
13421a420
142953659
151b70d05
hex132b7bf

20101055 has 16 divisors (see below), whose sum is σ = 27506304. Its totient is φ = 13969920.

The previous prime is 20101013. The next prime is 20101073. The reversal of 20101055 is 55010102.

It is not a de Polignac number, because 20101055 - 26 = 20100991 is a prime.

It is a super-2 number, since 2×201010552 = 808104824226050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7991 + ... + 10200.

It is an arithmetic number, because the mean of its divisors is an integer number (1719144).

Almost surely, 220101055 is an apocalyptic number.

20101055 is a deficient number, since it is larger than the sum of its proper divisors (7405249).

20101055 is a wasteful number, since it uses less digits than its factorization.

20101055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18226.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 20101055 is about 4483.4200115537. The cubic root of 20101055 is about 271.8981696024.

Adding to 20101055 its reverse (55010102), we get a palindrome (75111157).

The spelling of 20101055 in words is "twenty million, one hundred one thousand, fifty-five".