20426235 has 16 divisors (see below), whose sum is σ = 34402560. Its totient is φ = 10320480.

The previous prime is 20426233. The next prime is 20426243. The reversal of 20426235 is 53262402.

It is not a de Polignac number, because 20426235 - 2¹ = 20426233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20426233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35551 + ... + 36120.

It is an arithmetic number, because the mean of its divisors is an integer number (2150160).

Almost surely, 2^20426235 is an apocalyptic number.

20426235 is a deficient number, since it is larger than the sum of its proper divisors (13976325).

20426235 is a wasteful number, since it uses less digits than its factorization.

20426235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71698.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20426235 is about 4519.5392464277. The cubic root of 20426235 is about 273.3565227533.

Adding to 20426235 its reverse (53262402), we get a palindrome (73688637).

The spelling of 20426235 in words is "twenty million, four hundred twenty-six thousand, two hundred thirty-five".