20455441331 has 4 divisors (see below), whose sum is σ = 22028936832. Its totient is φ = 18881945832.

The previous prime is 20455441271. The next prime is 20455441333. The reversal of 20455441331 is 13314455402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20455441331 - 2¹⁸ = 20455179187 is a prime.

It is a super-2 number, since 2×20455441331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20455441333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786747731 + ... + 786747756.

It is an arithmetic number, because the mean of its divisors is an integer number (5507234208).

Almost surely, 2^20455441331 is an apocalyptic number.

20455441331 is a deficient number, since it is larger than the sum of its proper divisors (1573495501).

20455441331 is a wasteful number, since it uses less digits than its factorization.

20455441331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573495500.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 20455441331 its reverse (13314455402), we get a palindrome (33769896733).

The spelling of 20455441331 in words is "twenty billion, four hundred fifty-five million, four hundred forty-one thousand, three hundred thirty-one".