20426833 has 4 divisors (see below), whose sum is σ = 23344960. Its totient is φ = 17508708.

The previous prime is 20426831. The next prime is 20426839. The reversal of 20426833 is 33862402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20426833 - 2¹ = 20426831 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20426831) 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, 1459053 + ... + 1459066.

It is an arithmetic number, because the mean of its divisors is an integer number (5836240).

Almost surely, 2^20426833 is an apocalyptic number.

It is an amenable number.

20426833 is a deficient number, since it is larger than the sum of its proper divisors (2918127).

20426833 is an equidigital number, since it uses as much as digits as its factorization.

20426833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918126.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20426833 is about 4519.6054031298. The cubic root of 20426833 is about 273.3591903293.

The spelling of 20426833 in words is "twenty million, four hundred twenty-six thousand, eight hundred thirty-three".