20612420224 has 64 divisors (see below), whose sum is σ = 44926308000. Its totient is φ = 9342213120.

The previous prime is 20612420141. The next prime is 20612420261. The reversal of 20612420224 is 42202421602.

It is a tau number, because it is divible by the number of its divisors (64).

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, 470419 + ... + 512365.

Almost surely, 2^20612420224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20612420224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22463154000).

20612420224 is an abundant number, since it is smaller than the sum of its proper divisors (24313887776).

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

20612420224 is a wasteful number, since it uses less digits than its factorization.

20612420224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42321 (or 42309 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20612420224 its reverse (42202421602), we get a palindrome (62814841826).

The spelling of 20612420224 in words is "twenty billion, six hundred twelve million, four hundred twenty thousand, two hundred twenty-four".