20147755624855 has 16 divisors (see below), whose sum is σ = 24298743268800. Its totient is φ = 16037402664960.

The previous prime is 20147755624819. The next prime is 20147755624861. The reversal of 20147755624855 is 55842655774102.

It is not a de Polignac number, because 20147755624855 - 2²³ = 20147747236247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20147755624793 and 20147755624802.

It is a congruent number.

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, 8705451 + ... + 10774060.

It is an arithmetic number, because the mean of its divisors is an integer number (1518671454300).

Almost surely, 2^{20147755624855} is an apocalyptic number.

20147755624855 is a deficient number, since it is larger than the sum of its proper divisors (4150987643945).

20147755624855 is a wasteful number, since it uses less digits than its factorization.

20147755624855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19480554.

The product of its (nonzero) digits is 94080000, while the sum is 61.

The spelling of 20147755624855 in words is "twenty trillion, one hundred forty-seven billion, seven hundred fifty-five million, six hundred twenty-four thousand, eight hundred fifty-five".