21035500741 has 2 divisors, whose sum is σ = 21035500742. Its totient is φ = 21035500740.

The previous prime is 21035500669. The next prime is 21035500769. The reversal of 21035500741 is 14700553012.

It is a happy number.

It is an a-pointer prime, because the next prime (21035500769) can be obtained adding 21035500741 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18210153025 + 2825347716 = 134945^2 + 53154^2 .

It is a cyclic number.

It is not a de Polignac number, because 21035500741 - 2¹⁷ = 21035369669 is a prime.

It is a super-2 number, since 2×21035500741² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21035500841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517750370 + 10517750371.

It is an arithmetic number, because the mean of its divisors is an integer number (10517750371).

Almost surely, 2^21035500741 is an apocalyptic number.

It is an amenable number.

21035500741 is a deficient number, since it is larger than the sum of its proper divisors (1).

21035500741 is an equidigital number, since it uses as much as digits as its factorization.

21035500741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 21035500741 in words is "twenty-one billion, thirty-five million, five hundred thousand, seven hundred forty-one".