20201012555 has 8 divisors (see below), whose sum is σ = 24243397872. Its totient is φ = 16159354848.

The previous prime is 20201012521. The next prime is 20201012561. The reversal of 20201012555 is 55521010202.

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 20201012555 - 2¹⁴ = 20200996171 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 20201012555.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118832 + ... + 233501.

It is an arithmetic number, because the mean of its divisors is an integer number (3030424734).

Almost surely, 2^20201012555 is an apocalyptic number.

20201012555 is a deficient number, since it is larger than the sum of its proper divisors (4042385317).

20201012555 is a wasteful number, since it uses less digits than its factorization.

20201012555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363805.

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 20201012555 its reverse (55521010202), we get a palindrome (75722022757).

The spelling of 20201012555 in words is "twenty billion, two hundred one million, twelve thousand, five hundred fifty-five".