20420504226 has 24 divisors (see below), whose sum is σ = 44257065840. Its totient is φ = 6804890136.

The previous prime is 20420504213. The next prime is 20420504347. The reversal of 20420504226 is 62240502402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20420504226.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96580 + ... + 223983.

It is an arithmetic number, because the mean of its divisors is an integer number (1844044410).

Almost surely, 2^20420504226 is an apocalyptic number.

20420504226 is an abundant number, since it is smaller than the sum of its proper divisors (23836561614).

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

20420504226 is a wasteful number, since it uses less digits than its factorization.

20420504226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324110 (or 324107 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The spelling of 20420504226 in words is "twenty billion, four hundred twenty million, five hundred four thousand, two hundred twenty-six".