21103000547 has 2 divisors, whose sum is σ = 21103000548. Its totient is φ = 21103000546.

The previous prime is 21103000537. The next prime is 21103000573. The reversal of 21103000547 is 74500030112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21103000547 - 2⁶ = 21103000483 is a prime.

It is not a weakly prime, because it can be changed into another prime (21103000537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551500273 + 10551500274.

It is an arithmetic number, because the mean of its divisors is an integer number (10551500274).

Almost surely, 2^21103000547 is an apocalyptic number.

21103000547 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103000547 is an equidigital number, since it uses as much as digits as its factorization.

21103000547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

Adding to 21103000547 its reverse (74500030112), we get a palindrome (95603030659).

The spelling of 21103000547 in words is "twenty-one billion, one hundred three million, five hundred forty-seven", and thus it is an aban number.