20244142155 has 16 divisors (see below), whose sum is σ = 32399249184. Its totient is φ = 10794001920.

The previous prime is 20244142153. The next prime is 20244142187. The reversal of 20244142155 is 55124144202.

It is not a de Polignac number, because 20244142155 - 2¹ = 20244142153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20244142153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120766 + ... + 234675.

It is an arithmetic number, because the mean of its divisors is an integer number (2024953074).

Almost surely, 2^20244142155 is an apocalyptic number.

20244142155 is a deficient number, since it is larger than the sum of its proper divisors (12155107029).

20244142155 is a wasteful number, since it uses less digits than its factorization.

20244142155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359246.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 20244142155 its reverse (55124144202), we get a palindrome (75368286357).

The spelling of 20244142155 in words is "twenty billion, two hundred forty-four million, one hundred forty-two thousand, one hundred fifty-five".