20426425 has 12 divisors (see below), whose sum is σ = 26662480. Its totient is φ = 15480720.

The previous prime is 20426423. The next prime is 20426429. The reversal of 20426425 is 52462402.

It is not a de Polignac number, because 20426425 - 2¹ = 20426423 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 20426425.

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 11 ways as a sum of consecutive naturals, for example, 21027 + ... + 21976.

Almost surely, 2^20426425 is an apocalyptic number.

20426425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20426425 is a deficient number, since it is larger than the sum of its proper divisors (6236055).

20426425 is a wasteful number, since it uses less digits than its factorization.

20426425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43032 (or 43027 counting only the distinct ones).

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

The square root of 20426425 is about 4519.5602662206. The cubic root of 20426425 is about 273.3573703166.

Adding to 20426425 its reverse (52462402), we get a palindrome (72888827).

The spelling of 20426425 in words is "twenty million, four hundred twenty-six thousand, four hundred twenty-five".