20425426 has 32 divisors (see below), whose sum is σ = 36829440. Its totient is φ = 8306496.

The previous prime is 20425417. The next prime is 20425429. The reversal of 20425426 is 62452402.

It is a self number, because there is not a number n which added to its sum of digits gives 20425426.

It is not an unprimeable number, because it can be changed into a prime (20425429) 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, 73600 + ... + 73876.

It is an arithmetic number, because the mean of its divisors is an integer number (1150920).

Almost surely, 2^20425426 is an apocalyptic number.

20425426 is a deficient number, since it is larger than the sum of its proper divisors (16404014).

20425426 is a wasteful number, since it uses less digits than its factorization.

20425426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 20425426 is about 4519.4497452677. The cubic root of 20425426 is about 273.3529138594.

Adding to 20425426 its reverse (62452402), we get a palindrome (82877828).

The spelling of 20425426 in words is "twenty million, four hundred twenty-five thousand, four hundred twenty-six".