20426377 has 4 divisors (see below), whose sum is σ = 20462356. Its totient is φ = 20390400.

The previous prime is 20426321. The next prime is 20426389. The reversal of 20426377 is 77362402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13995081 + 6431296 = 3741^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 20426377 - 2⁷ = 20426249 is a prime.

It is a super-3 number, since 3×20426377³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20426317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17124 + ... + 18277.

It is an arithmetic number, because the mean of its divisors is an integer number (5115589).

Almost surely, 2^20426377 is an apocalyptic number.

It is an amenable number.

20426377 is a deficient number, since it is larger than the sum of its proper divisors (35979).

20426377 is an equidigital number, since it uses as much as digits as its factorization.

20426377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35978.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20426377 is about 4519.5549559664. The cubic root of 20426377 is about 273.3571561958.

Adding to 20426377 its reverse (77362402), we get a palindrome (97788779).

The spelling of 20426377 in words is "twenty million, four hundred twenty-six thousand, three hundred seventy-seven".