22615421020 has 12 divisors (see below), whose sum is σ = 47492384184. Its totient is φ = 9046168400.

The previous prime is 22615421009. The next prime is 22615421033. The reversal of 22615421020 is 2012451622.

It is a super-2 number, since 2×22615421020² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565385506 + ... + 565385545.

It is an arithmetic number, because the mean of its divisors is an integer number (3957698682).

Almost surely, 2^22615421020 is an apocalyptic number.

22615421020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22615421020 is an abundant number, since it is smaller than the sum of its proper divisors (24876963164).

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

22615421020 is a wasteful number, since it uses less digits than its factorization.

22615421020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130771060 (or 1130771058 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 22615421020 its reverse (2012451622), we get a palindrome (24627872642).

The spelling of 22615421020 in words is "twenty-two billion, six hundred fifteen million, four hundred twenty-one thousand, twenty".