20425354431213 has 24 divisors (see below), whose sum is σ = 27999930426048. Its totient is φ = 13244058694656.

The previous prime is 20425354431191. The next prime is 20425354431221. The reversal of 20425354431213 is 31213445352402.

It is a happy number.

It is not a de Polignac number, because 20425354431213 - 2¹² = 20425354427117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425354431113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10403320 + ... + 12209822.

It is an arithmetic number, because the mean of its divisors is an integer number (1166663767752).

Almost surely, 2^{20425354431213} is an apocalyptic number.

It is an amenable number.

20425354431213 is a deficient number, since it is larger than the sum of its proper divisors (7574575994835).

20425354431213 is a wasteful number, since it uses less digits than its factorization.

20425354431213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809333 (or 1809296 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 20425354431213 its reverse (31213445352402), we get a palindrome (51638799783615).

The spelling of 20425354431213 in words is "twenty trillion, four hundred twenty-five billion, three hundred fifty-four million, four hundred thirty-one thousand, two hundred thirteen".