Search a number
-
+
20312133001 = 179719316379
BaseRepresentation
bin10010111010101100…
…101000110110001001
31221102120212021020021
4102322230220312021
5313044401224001
613155315300441
71316232165436
oct227254506611
957376767207
1020312133001
118683740186
123b2a5aa721
131bb9263114
14da9936b8d
157dd374ba1
hex4bab28d89

20312133001 has 16 divisors (see below), whose sum is σ = 21743346240. Its totient is φ = 18907453440.

The previous prime is 20312132969. The next prime is 20312133043. The reversal of 20312133001 is 10033121302.

It is a cyclic number.

It is not a de Polignac number, because 20312133001 - 25 = 20312132969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312133301) 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 in 15 ways as a sum of consecutive naturals, for example, 3181030 + ... + 3187408.

It is an arithmetic number, because the mean of its divisors is an integer number (1358959140).

Almost surely, 220312133001 is an apocalyptic number.

It is an amenable number.

20312133001 is a deficient number, since it is larger than the sum of its proper divisors (1431213239).

20312133001 is a wasteful number, since it uses less digits than its factorization.

20312133001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8424.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20312133001 its reverse (10033121302), we get a palindrome (30345254303).

The spelling of 20312133001 in words is "twenty billion, three hundred twelve million, one hundred thirty-three thousand, one".

Divisors: 1 17 97 1649 1931 6379 32827 108443 187307 618763 3184219 10518971 12317849 209403433 1194831353 20312133001