20042152971 has 16 divisors (see below), whose sum is σ = 26802585600. Its totient is φ = 13321614528.

The previous prime is 20042152969. The next prime is 20042152997. The reversal of 20042152971 is 17925124002.

It is not a de Polignac number, because 20042152971 - 2¹ = 20042152969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20042152931) 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, 3293910 + ... + 3299988.

It is an arithmetic number, because the mean of its divisors is an integer number (1675161600).

Almost surely, 2^20042152971 is an apocalyptic number.

20042152971 is a deficient number, since it is larger than the sum of its proper divisors (6760432629).

20042152971 is a wasteful number, since it uses less digits than its factorization.

20042152971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9178.

The product of its (nonzero) digits is 10080, while the sum is 33.

Adding to 20042152971 its reverse (17925124002), we get a palindrome (37967276973).

The spelling of 20042152971 in words is "twenty billion, forty-two million, one hundred fifty-two thousand, nine hundred seventy-one".