20423234412 has 72 divisors (see below), whose sum is σ = 59127134976. Its totient is φ = 5822681184.

The previous prime is 20423234411. The next prime is 20423234413. The reversal of 20423234412 is 21443232402.

20423234412 is a `hidden beast` number, since 2 + 0 + 423 + 234 + 4 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20423234411) and next prime (20423234413).

It is not an unprimeable number, because it can be changed into a prime (20423234411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30913 + ... + 204455.

It is an arithmetic number, because the mean of its divisors is an integer number (821210208).

Almost surely, 2^20423234412 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 20423234412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29563567488).

20423234412 is an abundant number, since it is smaller than the sum of its proper divisors (38703900564).

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

20423234412 is a wasteful number, since it uses less digits than its factorization.

20423234412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174027 (or 174022 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20423234412 its reverse (21443232402), we get a palindrome (41866466814).

The spelling of 20423234412 in words is "twenty billion, four hundred twenty-three million, two hundred thirty-four thousand, four hundred twelve".