20533233490 has 32 divisors (see below), whose sum is σ = 46079777664. Its totient is φ = 6399968640.

The previous prime is 20533233467. The next prime is 20533233491. The reversal of 20533233490 is 9433233502.

It is a super-2 number, since 2×20533233490² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20533233491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13332499 + ... + 13334038.

It is an arithmetic number, because the mean of its divisors is an integer number (1439993052).

Almost surely, 2^20533233490 is an apocalyptic number.

20533233490 is an abundant number, since it is smaller than the sum of its proper divisors (25546544174).

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

20533233490 is a wasteful number, since it uses less digits than its factorization.

20533233490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26666562.

The product of its (nonzero) digits is 58320, while the sum is 34.

Adding to 20533233490 its reverse (9433233502), we get a palindrome (29966466992).

The spelling of 20533233490 in words is "twenty billion, five hundred thirty-three million, two hundred thirty-three thousand, four hundred ninety".