2003401020 has 48 divisors (see below), whose sum is σ = 5613068160. Its totient is φ = 533902656.

The previous prime is 2003400967. The next prime is 2003401027. The reversal of 2003401020 is 201043002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2003400987 and 2003401005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003401027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93691 + ... + 113069.

It is an arithmetic number, because the mean of its divisors is an integer number (116938920).

Almost surely, 2^2003401020 is an apocalyptic number.

2003401020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2003401020 is an abundant number, since it is smaller than the sum of its proper divisors (3609667140).

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

2003401020 is a wasteful number, since it uses less digits than its factorization.

2003401020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21114 (or 21112 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2003401020 is about 44759.3679580041. The cubic root of 2003401020 is about 1260.6348149076.

Adding to 2003401020 its reverse (201043002), we get a palindrome (2204444022).

The spelling of 2003401020 in words is "two billion, three million, four hundred one thousand, twenty".