20005051155 has 16 divisors (see below), whose sum is σ = 33890910624. Its totient is φ = 10041751040.

The previous prime is 20005051141. The next prime is 20005051169. The reversal of 20005051155 is 55115050002.

It is an interprime number because it is at equal distance from previous prime (20005051141) and next prime (20005051169).

It is not a de Polignac number, because 20005051155 - 2⁸ = 20005050899 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, 39225336 + ... + 39225845.

It is an arithmetic number, because the mean of its divisors is an integer number (2118181914).

Almost surely, 2^20005051155 is an apocalyptic number.

20005051155 is a deficient number, since it is larger than the sum of its proper divisors (13885859469).

20005051155 is a wasteful number, since it uses less digits than its factorization.

20005051155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78451206.

The product of its (nonzero) digits is 1250, while the sum is 24.

The spelling of 20005051155 in words is "twenty billion, five million, fifty-one thousand, one hundred fifty-five".