20401226 has 4 divisors (see below), whose sum is σ = 30601842. Its totient is φ = 10200612.

The previous prime is 20401223. The next prime is 20401273. The reversal of 20401226 is 62210402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62210402 = 2 ⋅31105201.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 2719201 = 4205^2 + 1649^2 .

It is not an unprimeable number, because it can be changed into a prime (20401223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100305 + ... + 5100308.

Almost surely, 2^20401226 is an apocalyptic number.

20401226 is a deficient number, since it is larger than the sum of its proper divisors (10200616).

20401226 is a wasteful number, since it uses less digits than its factorization.

20401226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200615.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20401226 is about 4516.7716346966. The cubic root of 20401226 is about 273.2449152180.

Adding to 20401226 its reverse (62210402), we get a palindrome (82611628).

The spelling of 20401226 in words is "twenty million, four hundred one thousand, two hundred twenty-six".