20426356 has 6 divisors (see below), whose sum is σ = 35746130. Its totient is φ = 10213176.

The previous prime is 20426321. The next prime is 20426389. The reversal of 20426356 is 65362402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20160100 + 266256 = 4490^2 + 516^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553291 + ... + 2553298.

Almost surely, 2^20426356 is an apocalyptic number.

It is an amenable number.

20426356 is a deficient number, since it is larger than the sum of its proper divisors (15319774).

20426356 is a wasteful number, since it uses less digits than its factorization.

20426356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106593 (or 5106591 counting only the distinct ones).

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

The square root of 20426356 is about 4519.5526327282. The cubic root of 20426356 is about 273.3570625179.

Adding to 20426356 its reverse (65362402), we get a palindrome (85788758).

The spelling of 20426356 in words is "twenty million, four hundred twenty-six thousand, three hundred fifty-six".