20420200426 has 8 divisors (see below), whose sum is σ = 31342633344. Its totient is φ = 9972655980.

The previous prime is 20420200421. The next prime is 20420200499. The reversal of 20420200426 is 62400202402.

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

It is a junction number, because it is equal to n+sod(n) for n = 20420200397 and 20420200406.

It is not an unprimeable number, because it can be changed into a prime (20420200421) 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, 118722010 + ... + 118722181.

It is an arithmetic number, because the mean of its divisors is an integer number (3917829168).

Almost surely, 2^20420200426 is an apocalyptic number.

20420200426 is a deficient number, since it is larger than the sum of its proper divisors (10922432918).

20420200426 is a wasteful number, since it uses less digits than its factorization.

20420200426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237444236.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20420200426 its reverse (62400202402), we get a palindrome (82820402828).

The spelling of 20420200426 in words is "twenty billion, four hundred twenty million, two hundred thousand, four hundred twenty-six".