13425300021 has 16 divisors (see below), whose sum is σ = 20483293824. Its totient is φ = 7661964864.

The previous prime is 13425300017. The next prime is 13425300047. The reversal of 13425300021 is 12000352431.

It is not a de Polignac number, because 13425300021 - 2² = 13425300017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13425300121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384330 + ... + 417803.

It is an arithmetic number, because the mean of its divisors is an integer number (1280205864).

Almost surely, 2^13425300021 is an apocalyptic number.

It is an amenable number.

13425300021 is a deficient number, since it is larger than the sum of its proper divisors (7057993803).

13425300021 is an equidigital number, since it uses as much as digits as its factorization.

13425300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802940.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 13425300021 its reverse (12000352431), we get a palindrome (25425652452).

The spelling of 13425300021 in words is "thirteen billion, four hundred twenty-five million, three hundred thousand, twenty-one".