21535451022 has 16 divisors (see below), whose sum is σ = 43078021200. Its totient is φ = 7177297152.

The previous prime is 21535451009. The next prime is 21535451033. The reversal of 21535451022 is 22015453512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256897 + ... + 330252.

It is an arithmetic number, because the mean of its divisors is an integer number (2692376325).

Almost surely, 2^21535451022 is an apocalyptic number.

21535451022 is an abundant number, since it is smaller than the sum of its proper divisors (21542570178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21535451022 is a wasteful number, since it uses less digits than its factorization.

21535451022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593267.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 21535451022 in words is "twenty-one billion, five hundred thirty-five million, four hundred fifty-one thousand, twenty-two".