21510350083 has 2 divisors, whose sum is σ = 21510350084. Its totient is φ = 21510350082.

The previous prime is 21510349979. The next prime is 21510350089. The reversal of 21510350083 is 38005301512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21510350083 - 2¹⁷ = 21510219011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21510350089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10755175041 + 10755175042.

It is an arithmetic number, because the mean of its divisors is an integer number (10755175042).

Almost surely, 2^21510350083 is an apocalyptic number.

21510350083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21510350083 is an equidigital number, since it uses as much as digits as its factorization.

21510350083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 21510350083 its reverse (38005301512), we get a palindrome (59515651595).

The spelling of 21510350083 in words is "twenty-one billion, five hundred ten million, three hundred fifty thousand, eighty-three".