20146256555 has 16 divisors (see below), whose sum is σ = 25655952960. Its totient is φ = 15134364672.

The previous prime is 20146256539. The next prime is 20146256573. The reversal of 20146256555 is 55565264102.

It is a cyclic number.

It is not a de Polignac number, because 20146256555 - 2⁴ = 20146256539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232634 + ... + 307263.

It is an arithmetic number, because the mean of its divisors is an integer number (1603497060).

Almost surely, 2^20146256555 is an apocalyptic number.

20146256555 is a deficient number, since it is larger than the sum of its proper divisors (5509696405).

20146256555 is a wasteful number, since it uses less digits than its factorization.

20146256555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540358.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 20146256555 in words is "twenty billion, one hundred forty-six million, two hundred fifty-six thousand, five hundred fifty-five".