21045015022 has 16 divisors (see below), whose sum is σ = 32420881152. Its totient is φ = 10239861240.

The previous prime is 21045015001. The next prime is 21045015029. The reversal of 21045015022 is 22051054012.

It is a junction number, because it is equal to n+sod(n) for n = 21045014984 and 21045015002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21045015029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428188 + ... + 474799.

It is an arithmetic number, because the mean of its divisors is an integer number (2026305072).

Almost surely, 2^21045015022 is an apocalyptic number.

21045015022 is a deficient number, since it is larger than the sum of its proper divisors (11375866130).

21045015022 is a wasteful number, since it uses less digits than its factorization.

21045015022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903303.

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 21045015022 its reverse (22051054012), we get a palindrome (43096069034).

The spelling of 21045015022 in words is "twenty-one billion, forty-five million, fifteen thousand, twenty-two".