21022145364 has 48 divisors (see below), whose sum is σ = 53650759680. Its totient is φ = 6353699040.

The previous prime is 21022145299. The next prime is 21022145393. The reversal of 21022145364 is 46354122012.

It is a congruent number.

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, 157354 + ... + 258465.

It is an arithmetic number, because the mean of its divisors is an integer number (1117724160).

Almost surely, 2^21022145364 is an apocalyptic number.

It is an amenable number.

21022145364 is an abundant number, since it is smaller than the sum of its proper divisors (32628614316).

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

21022145364 is a wasteful number, since it uses less digits than its factorization.

21022145364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416220 (or 416218 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 21022145364 its reverse (46354122012), we get a palindrome (67376267376).

The spelling of 21022145364 in words is "twenty-one billion, twenty-two million, one hundred forty-five thousand, three hundred sixty-four".