21425300525213 has 16 divisors (see below), whose sum is σ = 23641963430400. Its totient is φ = 19290097499520.

The previous prime is 21425300525147. The next prime is 21425300525219. The reversal of 21425300525213 is 31252500352412.

It is a cyclic number.

It is not a de Polignac number, because 21425300525213 - 2¹⁶ = 21425300459677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21425300525219) 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, 2753273 + ... + 7101486.

It is an arithmetic number, because the mean of its divisors is an integer number (1477622714400).

Almost surely, 2^{21425300525213} is an apocalyptic number.

It is an amenable number.

21425300525213 is a deficient number, since it is larger than the sum of its proper divisors (2216662905187).

21425300525213 is a wasteful number, since it uses less digits than its factorization.

21425300525213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9858892.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 21425300525213 its reverse (31252500352412), we get a palindrome (52677800877625).

The spelling of 21425300525213 in words is "twenty-one trillion, four hundred twenty-five billion, three hundred million, five hundred twenty-five thousand, two hundred thirteen".