2003455020 has 192 divisors, whose sum is σ = 6737504256. Its totient is φ = 434903040.

The previous prime is 2003455009. The next prime is 2003455031. The reversal of 2003455020 is 205543002.

2003455020 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2003455009) and next prime (2003455031).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1515960 + ... + 1517280.

It is an arithmetic number, because the mean of its divisors is an integer number (35091168).

Almost surely, 2^2003455020 is an apocalyptic number.

2003455020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2003455020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3368752128).

2003455020 is an abundant number, since it is smaller than the sum of its proper divisors (4734049236).

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

2003455020 is a wasteful number, since it uses less digits than its factorization.

2003455020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520 (or 1518 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 2003455020 is about 44759.9711796154. The cubic root of 2003455020 is about 1260.6461412585.

Adding to 2003455020 its reverse (205543002), we get a palindrome (2208998022).

The spelling of 2003455020 in words is "two billion, three million, four hundred fifty-five thousand, twenty".