451020020 has 48 divisors (see below), whose sum is σ = 1040256000. Its totient is φ = 162894720.

The previous prime is 451020001. The next prime is 451020067. The reversal of 451020020 is 20020154.

It is a junction number, because it is equal to n+sod(n) for n = 451019977 and 451020004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25901 + ... + 39659.

It is an arithmetic number, because the mean of its divisors is an integer number (21672000).

Almost surely, 2^451020020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520128000).

451020020 is an abundant number, since it is smaller than the sum of its proper divisors (589235980).

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

451020020 is a wasteful number, since it uses less digits than its factorization.

451020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13928 (or 13926 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 451020020 is about 21237.2319288555. The cubic root of 451020020 is about 766.8879961695.

Adding to 451020020 its reverse (20020154), we get a palindrome (471040174).

The spelling of 451020020 in words is "four hundred fifty-one million, twenty thousand, twenty".