21045300562 has 32 divisors (see below), whose sum is σ = 39038771520. Its totient is φ = 8365446720.

The previous prime is 21045300557. The next prime is 21045300593. The reversal of 21045300562 is 26500354012.

It is a self number, because there is not a number n which added to its sum of digits gives 21045300562.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1931013 + ... + 1941880.

It is an arithmetic number, because the mean of its divisors is an integer number (1219961610).

Almost surely, 2^21045300562 is an apocalyptic number.

21045300562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21045300562 is a deficient number, since it is larger than the sum of its proper divisors (17993470958).

21045300562 is a wasteful number, since it uses less digits than its factorization.

21045300562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3872938.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 21045300562 its reverse (26500354012), we get a palindrome (47545654574).

The spelling of 21045300562 in words is "twenty-one billion, forty-five million, three hundred thousand, five hundred sixty-two".