1011002320 has 20 divisors (see below), whose sum is σ = 2350580580. Its totient is φ = 404400896.

The previous prime is 1011002309. The next prime is 1011002341. The reversal of 1011002320 is 232001101.

It can be written as a sum of positive squares in 2 ways, for example, as 408201616 + 602800704 = 20204^2 + 24552^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1011002297 and 1011002306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6318685 + ... + 6318844.

It is an arithmetic number, because the mean of its divisors is an integer number (117529029).

Almost surely, 2^1011002320 is an apocalyptic number.

1011002320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011002320 is an abundant number, since it is smaller than the sum of its proper divisors (1339578260).

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

1011002320 is a wasteful number, since it uses less digits than its factorization.

1011002320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12637542 (or 12637536 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1011002320 is about 31796.2626734653. The cubic root of 1011002320 is about 1003.6540714981.

Adding to 1011002320 its reverse (232001101), we get a palindrome (1243003421).

The spelling of 1011002320 in words is "one billion, eleven million, two thousand, three hundred twenty".