20622603163240 has 128 divisors (see below), whose sum is σ = 52912802880000. Its totient is φ = 7166150627328.

The previous prime is 20622603163207. The next prime is 20622603163249. The reversal of 20622603163240 is 4236130622602.

It is a super-2 number, since 2×20622603163240² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20622603163240.

It is not an unprimeable number, because it can be changed into a prime (20622603163249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167005441 + ... + 167128879.

It is an arithmetic number, because the mean of its divisors is an integer number (413381272500).

Almost surely, 2^{20622603163240} is an apocalyptic number.

20622603163240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20622603163240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26456401440000).

20622603163240 is an abundant number, since it is smaller than the sum of its proper divisors (32290199716760).

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

20622603163240 is a wasteful number, since it uses less digits than its factorization.

20622603163240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142379 (or 142375 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 20622603163240 its reverse (4236130622602), we get a palindrome (24858733785842).

The spelling of 20622603163240 in words is "twenty trillion, six hundred twenty-two billion, six hundred three million, one hundred sixty-three thousand, two hundred forty".