20532215320 has 16 divisors (see below), whose sum is σ = 46197484560. Its totient is φ = 8212886112.

The previous prime is 20532215303. The next prime is 20532215321. The reversal of 20532215320 is 2351223502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20532215321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256652652 + ... + 256652731.

It is an arithmetic number, because the mean of its divisors is an integer number (2887342785).

Almost surely, 2^20532215320 is an apocalyptic number.

20532215320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20532215320 is an abundant number, since it is smaller than the sum of its proper divisors (25665269240).

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

20532215320 is a wasteful number, since it uses less digits than its factorization.

20532215320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513305394 (or 513305390 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20532215320 its reverse (2351223502), we get a palindrome (22883438822).

The spelling of 20532215320 in words is "twenty billion, five hundred thirty-two million, two hundred fifteen thousand, three hundred twenty".