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20684090932 = 225171022733
BaseRepresentation
bin10011010000110111…
…100010111000110100
31222101111202200120221
4103100313202320310
5314330111402212
613300243504124
71331366605051
oct232067427064
958344680527
1020684090932
1188546a272a
124013088044
131c4833697b
1410030bc028
15810d49807
hex4d0de2e34

20684090932 has 6 divisors (see below), whose sum is σ = 36197159138. Its totient is φ = 10342045464.

The previous prime is 20684090881. The next prime is 20684090939. The reversal of 20684090932 is 23909048602.

It can be written as a sum of positive squares in only one way, i.e., 17530819216 + 3153271716 = 132404^2 + 56154^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20684090939) by changing a digit.

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 as a sum of consecutive naturals, namely, 2585511363 + ... + 2585511370.

Almost surely, 220684090932 is an apocalyptic number.

It is an amenable number.

20684090932 is a deficient number, since it is larger than the sum of its proper divisors (15513068206).

20684090932 is a wasteful number, since it uses less digits than its factorization.

20684090932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5171022737 (or 5171022735 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 20684090932 in words is "twenty billion, six hundred eighty-four million, ninety thousand, nine hundred thirty-two".

Divisors: 1 2 4 5171022733 10342045466 20684090932