21310050544 has 40 divisors (see below), whose sum is σ = 42473355440. Its totient is φ = 10350125568.

The previous prime is 21310050527. The next prime is 21310050577. The reversal of 21310050544 is 44505001312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337372 + ... + 395524.

It is an arithmetic number, because the mean of its divisors is an integer number (1061833886).

Almost surely, 2^21310050544 is an apocalyptic number.

It is an amenable number.

21310050544 is a deficient number, since it is larger than the sum of its proper divisors (21163304896).

21310050544 is a wasteful number, since it uses less digits than its factorization.

21310050544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58817 (or 58811 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 21310050544 its reverse (44505001312), we get a palindrome (65815051856).

The spelling of 21310050544 in words is "twenty-one billion, three hundred ten million, fifty thousand, five hundred forty-four".