20213320131 has 12 divisors (see below), whose sum is σ = 30203812080. Its totient is φ = 13010872560.

The previous prime is 20213320117. The next prime is 20213320133. The reversal of 20213320131 is 13102331202.

20213320131 is a `hidden beast` number, since 2 + 0 + 213 + 320 + 131 = 666.

It is not a de Polignac number, because 20213320131 - 2⁷ = 20213320003 is a prime.

It is a super-2 number, since 2×20213320131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20213320133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38722575 + ... + 38723096.

It is an arithmetic number, because the mean of its divisors is an integer number (2516984340).

Almost surely, 2^20213320131 is an apocalyptic number.

20213320131 is a deficient number, since it is larger than the sum of its proper divisors (9990491949).

20213320131 is a wasteful number, since it uses less digits than its factorization.

20213320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77445706 (or 77445703 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20213320131 its reverse (13102331202), we get a palindrome (33315651333).

The spelling of 20213320131 in words is "twenty billion, two hundred thirteen million, three hundred twenty thousand, one hundred thirty-one".