420828194051 has 4 divisors (see below), whose sum is σ = 421444341432. Its totient is φ = 420212046672.

The previous prime is 420828194047. The next prime is 420828194063. The reversal of 420828194051 is 150491828024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420828194051 - 2² = 420828194047 is a prime.

It is a super-2 number, since 2×420828194051² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420828193993 and 420828194011.

It is not an unprimeable number, because it can be changed into a prime (420828194011) 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, 308072666 + ... + 308074031.

It is an arithmetic number, because the mean of its divisors is an integer number (105361085358).

Almost surely, 2^420828194051 is an apocalyptic number.

420828194051 is a deficient number, since it is larger than the sum of its proper divisors (616147381).

420828194051 is an equidigital number, since it uses as much as digits as its factorization.

420828194051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616147380.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 420828194051 in words is "four hundred twenty billion, eight hundred twenty-eight million, one hundred ninety-four thousand, fifty-one".