21201360583 has 4 divisors (see below), whose sum is σ = 22832234488. Its totient is φ = 19570486680.

The previous prime is 21201360503. The next prime is 21201360617. The reversal of 21201360583 is 38506310212.

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

It is a cyclic number.

It is not a de Polignac number, because 21201360583 - 2²¹ = 21199263431 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 (21201360503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815436933 + ... + 815436958.

It is an arithmetic number, because the mean of its divisors is an integer number (5708058622).

Almost surely, 2^21201360583 is an apocalyptic number.

21201360583 is a deficient number, since it is larger than the sum of its proper divisors (1630873905).

21201360583 is a wasteful number, since it uses less digits than its factorization.

21201360583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630873904.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 21201360583 its reverse (38506310212), we get a palindrome (59707670795).

The spelling of 21201360583 in words is "twenty-one billion, two hundred one million, three hundred sixty thousand, five hundred eighty-three".