20425354431215 has 8 divisors (see below), whose sum is σ = 24805731647088. Its totient is φ = 16143412658560.

The previous prime is 20425354431191. The next prime is 20425354431221. The reversal of 20425354431215 is 51213445352402.

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

It is not a de Polignac number, because 20425354431215 - 2⁶ = 20425354431151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24608860346 + ... + 24608861175.

It is an arithmetic number, because the mean of its divisors is an integer number (3100716455886).

Almost surely, 2^{20425354431215} is an apocalyptic number.

20425354431215 is a deficient number, since it is larger than the sum of its proper divisors (4380377215873).

20425354431215 is an equidigital number, since it uses as much as digits as its factorization.

20425354431215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49217721609.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 20425354431215 its reverse (51213445352402), we get a palindrome (71638799783617).

The spelling of 20425354431215 in words is "twenty trillion, four hundred twenty-five billion, three hundred fifty-four million, four hundred thirty-one thousand, two hundred fifteen".