20021441131 has 4 divisors (see below), whose sum is σ = 20037733200. Its totient is φ = 20005149064.

The previous prime is 20021441119. The next prime is 20021441137. The reversal of 20021441131 is 13114412002.

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 20021441131 - 2⁹ = 20021440619 is a prime.

It is a super-2 number, since 2×20021441131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021441099 and 20021441108.

It is not an unprimeable number, because it can be changed into a prime (20021441137) 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, 8144191 + ... + 8146648.

It is an arithmetic number, because the mean of its divisors is an integer number (5009433300).

Almost surely, 2^20021441131 is an apocalyptic number.

20021441131 is a deficient number, since it is larger than the sum of its proper divisors (16292069).

20021441131 is a wasteful number, since it uses less digits than its factorization.

20021441131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16292068.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20021441131 its reverse (13114412002), we get a palindrome (33135853133).

The spelling of 20021441131 in words is "twenty billion, twenty-one million, four hundred forty-one thousand, one hundred thirty-one".