1002103020 has 36 divisors (see below), whose sum is σ = 3039713040. Its totient is φ = 267227424.

The previous prime is 1002103009. The next prime is 1002103021. The reversal of 1002103020 is 203012001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1002102993 and 1002103011.

It is not an unprimeable number, because it can be changed into a prime (1002103021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2783440 + ... + 2783799.

Almost surely, 2^1002103020 is an apocalyptic number.

1002103020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002103020 is an abundant number, since it is smaller than the sum of its proper divisors (2037610020).

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

1002103020 is a wasteful number, since it uses less digits than its factorization.

1002103020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5567254 (or 5567249 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1002103020 is about 31656.0108036373. The cubic root of 1002103020 is about 1000.7005158297.

Adding to 1002103020 its reverse (203012001), we get a palindrome (1205115021).

The spelling of 1002103020 in words is "one billion, two million, one hundred three thousand, twenty".