21350488937 has 2 divisors, whose sum is σ = 21350488938. Its totient is φ = 21350488936.

The previous prime is 21350488927. The next prime is 21350488987. The reversal of 21350488937 is 73988405312.

It is an a-pointer prime, because the next prime (21350488987) can be obtained adding 21350488937 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19615683136 + 1734805801 = 140056^2 + 41651^2 .

It is a cyclic number.

It is not a de Polignac number, because 21350488937 - 2¹⁰ = 21350487913 is a prime.

It is not a weakly prime, because it can be changed into another prime (21350488927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10675244468 + 10675244469.

It is an arithmetic number, because the mean of its divisors is an integer number (10675244469).

Almost surely, 2^21350488937 is an apocalyptic number.

It is an amenable number.

21350488937 is a deficient number, since it is larger than the sum of its proper divisors (1).

21350488937 is an equidigital number, since it uses as much as digits as its factorization.

21350488937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 21350488937 in words is "twenty-one billion, three hundred fifty million, four hundred eighty-eight thousand, nine hundred thirty-seven".