21626130385 has 8 divisors (see below), whose sum is σ = 26002952640. Its totient is φ = 17266506864.

The previous prime is 21626130373. The next prime is 21626130437. The reversal of 21626130385 is 58303162612.

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 21626130385 - 2¹⁵ = 21626097617 is a prime.

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, 4296915 + ... + 4301944.

It is an arithmetic number, because the mean of its divisors is an integer number (3250369080).

Almost surely, 2^21626130385 is an apocalyptic number.

It is an amenable number.

21626130385 is a deficient number, since it is larger than the sum of its proper divisors (4376822255).

21626130385 is an equidigital number, since it uses as much as digits as its factorization.

21626130385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8599367.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 21626130385 its reverse (58303162612), we get a palindrome (79929292997).

The spelling of 21626130385 in words is "twenty-one billion, six hundred twenty-six million, one hundred thirty thousand, three hundred eighty-five".