21040450522 has 32 divisors (see below), whose sum is σ = 38852755200. Its totient is φ = 8321799168.

The previous prime is 21040450511. The next prime is 21040450589. The reversal of 21040450522 is 22505404012.

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, 1003179 + ... + 1023937.

It is an arithmetic number, because the mean of its divisors is an integer number (1214148600).

Almost surely, 2^21040450522 is an apocalyptic number.

21040450522 is a deficient number, since it is larger than the sum of its proper divisors (17812304678).

21040450522 is a wasteful number, since it uses less digits than its factorization.

21040450522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26350.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 21040450522 its reverse (22505404012), we get a palindrome (43545854534).

The spelling of 21040450522 in words is "twenty-one billion, forty million, four hundred fifty thousand, five hundred twenty-two".