20426426 has 16 divisors (see below), whose sum is σ = 31159296. Its totient is φ = 10041696.

The previous prime is 20426423. The next prime is 20426429. The reversal of 20426426 is 62462402.

It is an interprime number because it is at equal distance from previous prime (20426423) and next prime (20426429).

It is a junction number, because it is equal to n+sod(n) for n = 20426395 and 20426404.

It is not an unprimeable number, because it can be changed into a prime (20426423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34505 + ... + 35091.

It is an arithmetic number, because the mean of its divisors is an integer number (1947456).

Almost surely, 2^20426426 is an apocalyptic number.

20426426 is a deficient number, since it is larger than the sum of its proper divisors (10732870).

20426426 is a wasteful number, since it uses less digits than its factorization.

20426426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 20426426 is about 4519.5603768508. The cubic root of 20426426 is about 273.3573747774.

Adding to 20426426 its reverse (62462402), we get a palindrome (82888828).

The spelling of 20426426 in words is "twenty million, four hundred twenty-six thousand, four hundred twenty-six".