20426437 has 8 divisors (see below), whose sum is σ = 20699712. Its totient is φ = 20155200.

The previous prime is 20426429. The next prime is 20426443. The reversal of 20426437 is 73462402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20426437 - 2³ = 20426429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426447) 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, 31248 + ... + 31894.

It is an arithmetic number, because the mean of its divisors is an integer number (2587464).

Almost surely, 2^20426437 is an apocalyptic number.

It is an amenable number.

20426437 is a deficient number, since it is larger than the sum of its proper divisors (273275).

20426437 is a wasteful number, since it uses less digits than its factorization.

20426437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 20426437 is about 4519.5615937832. The cubic root of 20426437 is about 273.3574238467.

Adding to 20426437 its reverse (73462402), we get a palindrome (93888839).

The spelling of 20426437 in words is "twenty million, four hundred twenty-six thousand, four hundred thirty-seven".