20525231213 has 8 divisors (see below), whose sum is σ = 21606895200. Its totient is φ = 19443706128.

The previous prime is 20525231191. The next prime is 20525231219. The reversal of 20525231213 is 31213252502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20525231213 - 2²² = 20521036909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525231219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424295 + ... + 470187.

It is an arithmetic number, because the mean of its divisors is an integer number (2700861900).

Almost surely, 2^20525231213 is an apocalyptic number.

It is an amenable number.

20525231213 is a deficient number, since it is larger than the sum of its proper divisors (1081663987).

20525231213 is a wasteful number, since it uses less digits than its factorization.

20525231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69451.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20525231213 its reverse (31213252502), we get a palindrome (51738483715).

The spelling of 20525231213 in words is "twenty billion, five hundred twenty-five million, two hundred thirty-one thousand, two hundred thirteen".