20262172132147 has 16 divisors (see below), whose sum is σ = 22370806176768. Its totient is φ = 18197980498080.

The previous prime is 20262172132129. The next prime is 20262172132211. The reversal of 20262172132147 is 74123127126202.

It is a cyclic number.

It is not a de Polignac number, because 20262172132147 - 2²³ = 20262163743539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20262172162147) 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, 119320033 + ... + 119489725.

It is an arithmetic number, because the mean of its divisors is an integer number (1398175386048).

Almost surely, 2^{20262172132147} is an apocalyptic number.

20262172132147 is a deficient number, since it is larger than the sum of its proper divisors (2108634044621).

20262172132147 is a wasteful number, since it uses less digits than its factorization.

20262172132147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300570.

The product of its (nonzero) digits is 112896, while the sum is 40.

Adding to 20262172132147 its reverse (74123127126202), we get a palindrome (94385299258349).

The spelling of 20262172132147 in words is "twenty trillion, two hundred sixty-two billion, one hundred seventy-two million, one hundred thirty-two thousand, one hundred forty-seven".