20321053541 has 8 divisors (see below), whose sum is σ = 21268647744. Its totient is φ = 19378798560.

The previous prime is 20321053517. The next prime is 20321053549. The reversal of 20321053541 is 14535012302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20321053541 - 2¹⁸ = 20320791397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20321053541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321053549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1327016 + ... + 1342241.

It is an arithmetic number, because the mean of its divisors is an integer number (2658580968).

Almost surely, 2^20321053541 is an apocalyptic number.

It is an amenable number.

20321053541 is a deficient number, since it is larger than the sum of its proper divisors (947594203).

20321053541 is a wasteful number, since it uses less digits than its factorization.

20321053541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669611.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20321053541 its reverse (14535012302), we get a palindrome (34856065843).

The spelling of 20321053541 in words is "twenty billion, three hundred twenty-one million, fifty-three thousand, five hundred forty-one".