[go: up one dir, main page]

Search a number
-
+
21836939 is a prime number
BaseRepresentation
bin101001101001…
…1010010001011
31112002102122112
41103103102023
521042240224
62100012535
7353416355
oct123232213
945072575
1021836939
1111365463
12739114b
1346a7587
142c860d5
151db530e
hex14d348b

21836939 has 2 divisors, whose sum is σ = 21836940. Its totient is φ = 21836938.

The previous prime is 21836921. The next prime is 21836953. The reversal of 21836939 is 93963812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21836939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21836896 and 21836905.

It is not a weakly prime, because it can be changed into another prime (21833939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10918469 + 10918470.

It is an arithmetic number, because the mean of its divisors is an integer number (10918470).

Almost surely, 221836939 is an apocalyptic number.

21836939 is a deficient number, since it is larger than the sum of its proper divisors (1).

21836939 is an equidigital number, since it uses as much as digits as its factorization.

21836939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 21836939 is about 4673.0010699763. The cubic root of 21836939 is about 279.5099378509.

The spelling of 21836939 in words is "twenty-one million, eight hundred thirty-six thousand, nine hundred thirty-nine".