20555364523 has 8 divisors (see below), whose sum is σ = 21452889600. Its totient is φ = 19658157288.

The previous prime is 20555364521. The next prime is 20555364559. The reversal of 20555364523 is 32546355502.

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 20555364523 - 2¹ = 20555364521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20555364521) 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, 57768 + ... + 210826.

It is an arithmetic number, because the mean of its divisors is an integer number (2681611200).

Almost surely, 2^20555364523 is an apocalyptic number.

20555364523 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20555364523 is a deficient number, since it is larger than the sum of its proper divisors (897525077).

20555364523 is a wasteful number, since it uses less digits than its factorization.

20555364523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158921.

The product of its (nonzero) digits is 540000, while the sum is 40.

The spelling of 20555364523 in words is "twenty billion, five hundred fifty-five million, three hundred sixty-four thousand, five hundred twenty-three".