20533240206 has 32 divisors (see below), whose sum is σ = 46862654880. Its totient is φ = 6659428608.

The previous prime is 20533240193. The next prime is 20533240223. The reversal of 20533240206 is 60204233502.

It is a super-2 number, since 2×20533240206² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20533240206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5136451 + ... + 5140446.

It is an arithmetic number, because the mean of its divisors is an integer number (1464457965).

Almost surely, 2^20533240206 is an apocalyptic number.

20533240206 is an abundant number, since it is smaller than the sum of its proper divisors (26329414674).

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

20533240206 is a wasteful number, since it uses less digits than its factorization.

20533240206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10276945 (or 10276939 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 20533240206 its reverse (60204233502), we get a palindrome (80737473708).

The spelling of 20533240206 in words is "twenty billion, five hundred thirty-three million, two hundred forty thousand, two hundred six".