20213230131 has 14 divisors (see below), whose sum is σ = 30305982620. Its totient is φ = 13475486268.

The previous prime is 20213230127. The next prime is 20213230189. The reversal of 20213230131 is 13103231202.

20213230131 is a `hidden beast` number, since 202 + 132 + 301 + 31 = 666.

It is not a de Polignac number, because 20213230131 - 2² = 20213230127 is a prime.

It is a super-2 number, since 2×20213230131² (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 (20213232131) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 13862941 + ... + 13864398.

Almost surely, 2^20213230131 is an apocalyptic number.

20213230131 is a deficient number, since it is larger than the sum of its proper divisors (10092752489).

20213230131 is an frugal number, since it uses more digits than its factorization.

20213230131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27727357 (or 27727342 counting only the distinct ones).

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

Adding to 20213230131 its reverse (13103231202), we get a palindrome (33316461333).

The spelling of 20213230131 in words is "twenty billion, two hundred thirteen million, two hundred thirty thousand, one hundred thirty-one".