20503155541 has 8 divisors (see below), whose sum is σ = 23682789504. Its totient is φ = 17542806720.

The previous prime is 20503155539. The next prime is 20503155551. The reversal of 20503155541 is 14555130502.

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 20503155541 - 2¹ = 20503155539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503155511) 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, 54821085 + ... + 54821458.

It is an arithmetic number, because the mean of its divisors is an integer number (2960348688).

Almost surely, 2^20503155541 is an apocalyptic number.

It is an amenable number.

20503155541 is a deficient number, since it is larger than the sum of its proper divisors (3179633963).

20503155541 is a wasteful number, since it uses less digits than its factorization.

20503155541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109642571.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 20503155541 in words is "twenty billion, five hundred three million, one hundred fifty-five thousand, five hundred forty-one".