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20620701 = 322291189
BaseRepresentation
bin100111010101…
…0010110011101
31102210122021200
41032222112131
520234330301
62013550113
7340162443
oct116522635
942718250
1020620701
1110704702
126aa5339
13436caca
142a4ab93
151c24c86
hex13aa59d

20620701 has 6 divisors (see below), whose sum is σ = 29785470. Its totient is φ = 13747128.

The previous prime is 20620687. The next prime is 20620709. The reversal of 20620701 is 10702602.

It can be divided in two parts, 20620 and 701, that added together give a triangular number (21321 = T206).

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16818201 + 3802500 = 4101^2 + 1950^2 .

It is not a de Polignac number, because 20620701 - 25 = 20620669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1145586 + ... + 1145603.

It is an arithmetic number, because the mean of its divisors is an integer number (4964245).

Almost surely, 220620701 is an apocalyptic number.

It is an amenable number.

20620701 is a deficient number, since it is larger than the sum of its proper divisors (9164769).

20620701 is a wasteful number, since it uses less digits than its factorization.

20620701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291195 (or 2291192 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20620701 is about 4541.0022021576. The cubic root of 20620701 is about 274.2212724121.

The spelling of 20620701 in words is "twenty million, six hundred twenty thousand, seven hundred one".

Divisors: 1 3 9 2291189 6873567 20620701