20626234 has 4 divisors (see below), whose sum is σ = 30939354. Its totient is φ = 10313116.

The previous prime is 20626231. The next prime is 20626241. The reversal of 20626234 is 43262602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43262602 = 2 ⋅21631301.

It can be written as a sum of positive squares in only one way, i.e., 20223009 + 403225 = 4497^2 + 635^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20626199 and 20626208.

It is not an unprimeable number, because it can be changed into a prime (20626231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5156557 + ... + 5156560.

Almost surely, 2^20626234 is an apocalyptic number.

20626234 is a deficient number, since it is larger than the sum of its proper divisors (10313120).

20626234 is a wasteful number, since it uses less digits than its factorization.

20626234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10313119.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 20626234 is about 4541.6113880428. The cubic root of 20626234 is about 274.2457968065.

Adding to 20626234 its reverse (43262602), we get a palindrome (63888836).

The spelling of 20626234 in words is "twenty million, six hundred twenty-six thousand, two hundred thirty-four".