20533142406 has 96 divisors (see below), whose sum is σ = 49174352640. Its totient is φ = 5598724032.

The previous prime is 20533142369. The next prime is 20533142407. The reversal of 20533142406 is 60424133502.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533142407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13752196 + ... + 13753688.

It is an arithmetic number, because the mean of its divisors is an integer number (512232840).

Almost surely, 2^20533142406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20533142406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24587176320).

20533142406 is an abundant number, since it is smaller than the sum of its proper divisors (28641210234).

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

20533142406 is a wasteful number, since it uses less digits than its factorization.

20533142406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 20533142406 its reverse (60424133502), we get a palindrome (80957275908).

The spelling of 20533142406 in words is "twenty billion, five hundred thirty-three million, one hundred forty-two thousand, four hundred six".