20321200542 has 8 divisors (see below), whose sum is σ = 40642401096. Its totient is φ = 6773733512.

The previous prime is 20321200541. The next prime is 20321200553. The reversal of 20321200542 is 24500212302.

It is a sphenic number, since it is the product of 3 distinct primes.

20321200542 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321200541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693433373 + ... + 1693433384.

It is an arithmetic number, because the mean of its divisors is an integer number (5080300137).

Almost surely, 2^20321200542 is an apocalyptic number.

20321200542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20321200542 is a wasteful number, since it uses less digits than its factorization.

20321200542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386866762.

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 20321200542 its reverse (24500212302), we get a palindrome (44821412844).

The spelling of 20321200542 in words is "twenty billion, three hundred twenty-one million, two hundred thousand, five hundred forty-two".