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20312983 is a prime number
BaseRepresentation
bin100110101111…
…1001110010111
31102020000011201
41031133032113
520200003413
62003213331
7334441345
oct115371627
942200151
1020312983
1110514499
126977247
134292a22
1429aa995
151bb39dd
hex135f397

20312983 has 2 divisors, whose sum is σ = 20312984. Its totient is φ = 20312982.

The previous prime is 20312959. The next prime is 20312989. The reversal of 20312983 is 38921302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20312983 - 25 = 20312951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156491 + 10156492.

It is an arithmetic number, because the mean of its divisors is an integer number (10156492).

Almost surely, 220312983 is an apocalyptic number.

20312983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312983 is an equidigital number, since it uses as much as digits as its factorization.

20312983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20312983 is about 4506.9926780504. The cubic root of 20312983 is about 272.8503833851.

The spelling of 20312983 in words is "twenty million, three hundred twelve thousand, nine hundred eighty-three".