21080301573 has 16 divisors (see below), whose sum is σ = 29826224640. Its totient is φ = 13214669424.

The previous prime is 21080301551. The next prime is 21080301607. The reversal of 21080301573 is 37510308012.

It is not a de Polignac number, because 21080301573 - 2³³ = 12490366981 is a prime.

It is a super-2 number, since 2×21080301573² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21080301573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21080301503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2585011 + ... + 2593152.

It is an arithmetic number, because the mean of its divisors is an integer number (1864139040).

Almost surely, 2^21080301573 is an apocalyptic number.

21080301573 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21080301573 is a deficient number, since it is larger than the sum of its proper divisors (8745923067).

21080301573 is a wasteful number, since it uses less digits than its factorization.

21080301573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5178248.

The product of its (nonzero) digits is 5040, while the sum is 30.

Adding to 21080301573 its reverse (37510308012), we get a palindrome (58590609585).

The spelling of 21080301573 in words is "twenty-one billion, eighty million, three hundred one thousand, five hundred seventy-three".