1020011004 has 18 divisors (see below), whose sum is σ = 2578361240. Its totient is φ = 340003656.

The previous prime is 1020010993. The next prime is 1020011017. The reversal of 1020011004 is 4001100201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14166784 + ... + 14166855.

Almost surely, 2^1020011004 is an apocalyptic number.

It is an amenable number.

1020011004 is an abundant number, since it is smaller than the sum of its proper divisors (1558350236).

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

1020011004 is a wasteful number, since it uses less digits than its factorization.

1020011004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28333649 (or 28333644 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1020011004 is about 31937.6111191805. The cubic root of 1020011004 is about 1006.6263294413.

Adding to 1020011004 its reverse (4001100201), we get a palindrome (5021111205).

The spelling of 1020011004 in words is "one billion, twenty million, eleven thousand, four".