21836280007 has 2 divisors, whose sum is σ = 21836280008. Its totient is φ = 21836280006.

The previous prime is 21836279977. The next prime is 21836280031. The reversal of 21836280007 is 70008263812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21836280007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21836280097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10918140003 + 10918140004.

It is an arithmetic number, because the mean of its divisors is an integer number (10918140004).

Almost surely, 2^21836280007 is an apocalyptic number.

21836280007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21836280007 is an equidigital number, since it uses as much as digits as its factorization.

21836280007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 21836280007 in words is "twenty-one billion, eight hundred thirty-six million, two hundred eighty thousand, seven".