20520302144331 has 16 divisors (see below), whose sum is σ = 30268102526208. Its totient is φ = 12261384122400.

The previous prime is 20520302144317. The next prime is 20520302144369. The reversal of 20520302144331 is 13344120302502.

It is not a de Polignac number, because 20520302144331 - 2⁶ = 20520302144267 is a prime.

It is a super-2 number, since 2×20520302144331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20520302144131) 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, 4379063416 + ... + 4379068101.

It is an arithmetic number, because the mean of its divisors is an integer number (1891756407888).

Almost surely, 2^{20520302144331} is an apocalyptic number.

20520302144331 is a deficient number, since it is larger than the sum of its proper divisors (9747800381877).

20520302144331 is a wasteful number, since it uses less digits than its factorization.

20520302144331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8758131602.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 20520302144331 its reverse (13344120302502), we get a palindrome (33864422446833).

The spelling of 20520302144331 in words is "twenty trillion, five hundred twenty billion, three hundred two million, one hundred forty-four thousand, three hundred thirty-one".