20623430212 has 72 divisors (see below), whose sum is σ = 45391389120. Its totient is φ = 8025547200.

The previous prime is 20623430209. The next prime is 20623430221. The reversal of 20623430212 is 21203432602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3286614 + ... + 3292882.

It is an arithmetic number, because the mean of its divisors is an integer number (630435960).

Almost surely, 2^20623430212 is an apocalyptic number.

20623430212 is a gapful number since it is divisible by the number (22) 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 20623430212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22695694560).

20623430212 is an abundant number, since it is smaller than the sum of its proper divisors (24767958908).

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

20623430212 is a wasteful number, since it uses less digits than its factorization.

20623430212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7273 (or 7260 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20623430212 its reverse (21203432602), we get a palindrome (41826862814).

The spelling of 20623430212 in words is "twenty billion, six hundred twenty-three million, four hundred thirty thousand, two hundred twelve".