21203276741 has 4 divisors (see below), whose sum is σ = 22450528332. Its totient is φ = 19956025152.

The previous prime is 21203276729. The next prime is 21203276749. The reversal of 21203276741 is 14767230212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5616753025 + 15586523716 = 74945^2 + 124846^2 .

It is a cyclic number.

It is not a de Polignac number, because 21203276741 - 2¹⁸ = 21203014597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203276749) 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 in 3 ways as a sum of consecutive naturals, for example, 623625770 + ... + 623625803.

It is an arithmetic number, because the mean of its divisors is an integer number (5612632083).

Almost surely, 2^21203276741 is an apocalyptic number.

It is an amenable number.

21203276741 is a deficient number, since it is larger than the sum of its proper divisors (1247251591).

21203276741 is a wasteful number, since it uses less digits than its factorization.

21203276741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247251590.

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 21203276741 in words is "twenty-one billion, two hundred three million, two hundred seventy-six thousand, seven hundred forty-one".