20400635226 has 8 divisors (see below), whose sum is σ = 40801270464. Its totient is φ = 6800211740.

The previous prime is 20400635207. The next prime is 20400635251. The reversal of 20400635226 is 62253600402.

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

20400635226 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20400635193 and 20400635202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1700052930 + ... + 1700052941.

It is an arithmetic number, because the mean of its divisors is an integer number (5100158808).

Almost surely, 2^20400635226 is an apocalyptic number.

20400635226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20400635226 is a wasteful number, since it uses less digits than its factorization.

20400635226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400105876.

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 20400635226 in words is "twenty billion, four hundred million, six hundred thirty-five thousand, two hundred twenty-six".