20671226 has 4 divisors (see below), whose sum is σ = 31006842. Its totient is φ = 10335612.

The previous prime is 20671213. The next prime is 20671241. The reversal of 20671226 is 62217602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62217602 = 2 ⋅31108801.

It can be written as a sum of positive squares in only one way, i.e., 19669225 + 1002001 = 4435^2 + 1001^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20671195 and 20671204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5167805 + ... + 5167808.

Almost surely, 2^20671226 is an apocalyptic number.

20671226 is a deficient number, since it is larger than the sum of its proper divisors (10335616).

20671226 is a wasteful number, since it uses less digits than its factorization.

20671226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10335615.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20671226 is about 4546.5619978177. The cubic root of 20671226 is about 274.4450560954.

Adding to 20671226 its reverse (62217602), we get a palindrome (82888828).

The spelling of 20671226 in words is "twenty million, six hundred seventy-one thousand, two hundred twenty-six".