21314105803 has 2 divisors, whose sum is σ = 21314105804. Its totient is φ = 21314105802.

The previous prime is 21314105749. The next prime is 21314105809. The reversal of 21314105803 is 30850141312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21314105803 - 2¹³ = 21314097611 is a prime.

It is a super-2 number, since 2×21314105803² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21314105809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10657052901 + 10657052902.

It is an arithmetic number, because the mean of its divisors is an integer number (10657052902).

Almost surely, 2^21314105803 is an apocalyptic number.

21314105803 is a deficient number, since it is larger than the sum of its proper divisors (1).

21314105803 is an equidigital number, since it uses as much as digits as its factorization.

21314105803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

It can be divided in two parts, 213 and 14105803, that added together give a triangular number (14106016 = T₅₃₁₁).

The spelling of 21314105803 in words is "twenty-one billion, three hundred fourteen million, one hundred five thousand, eight hundred three".