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20312010302 = 210156005151
BaseRepresentation
bin10010111010101100…
…001010111000111110
31221102120122000220212
4102322230022320332
5313044333312202
613155312512422
71316231144633
oct227254127076
957376560825
1020312010302
118683666a81
123b2a54b712
131bb921c30c
14da990418a
157dd34d652
hex4bab0ae3e

20312010302 has 4 divisors (see below), whose sum is σ = 30468015456. Its totient is φ = 10156005150.

The previous prime is 20312010283. The next prime is 20312010317. The reversal of 20312010302 is 20301021302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20301021302 = 210150510651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078002574 + ... + 5078002577.

It is an arithmetic number, because the mean of its divisors is an integer number (7617003864).

Almost surely, 220312010302 is an apocalyptic number.

20312010302 is a deficient number, since it is larger than the sum of its proper divisors (10156005154).

20312010302 is a wasteful number, since it uses less digits than its factorization.

20312010302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10156005153.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20312010302 its reverse (20301021302), we get a palindrome (40613031604).

The spelling of 20312010302 in words is "twenty billion, three hundred twelve million, ten thousand, three hundred two".

Divisors: 1 2 10156005151 20312010302