20010143555 has 4 divisors (see below), whose sum is σ = 24012172272. Its totient is φ = 16008114840.

The previous prime is 20010143551. The next prime is 20010143597. The reversal of 20010143555 is 55534101002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20010143555 - 2² = 20010143551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010143551) 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, 2001014351 + ... + 2001014360.

It is an arithmetic number, because the mean of its divisors is an integer number (6003043068).

Almost surely, 2^20010143555 is an apocalyptic number.

20010143555 is a deficient number, since it is larger than the sum of its proper divisors (4002028717).

20010143555 is an equidigital number, since it uses as much as digits as its factorization.

20010143555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002028716.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 20010143555 its reverse (55534101002), we get a palindrome (75544244557).

The spelling of 20010143555 in words is "twenty billion, ten million, one hundred forty-three thousand, five hundred fifty-five".