20626345 has 8 divisors (see below), whose sum is σ = 24822720. Its totient is φ = 16453680.

The previous prime is 20626339. The next prime is 20626363. The reversal of 20626345 is 54362602.

It is a happy number.

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

It is not a de Polignac number, because 20626345 - 2⁵ = 20626313 is a prime.

It is a super-2 number, since 2×20626345² = 850892216118050, which contains 22 as substring.

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, 3951 + ... + 7540.

It is an arithmetic number, because the mean of its divisors is an integer number (3102840).

Almost surely, 2^20626345 is an apocalyptic number.

It is an amenable number.

20626345 is a deficient number, since it is larger than the sum of its proper divisors (4196375).

20626345 is a wasteful number, since it uses less digits than its factorization.

20626345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11855.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 20626345 is about 4541.6236083586. The cubic root of 20626345 is about 274.2462887565.

Adding to 20626345 its reverse (54362602), we get a palindrome (74988947).

The spelling of 20626345 in words is "twenty million, six hundred twenty-six thousand, three hundred forty-five".