3661300020 has 96 divisors (see below), whose sum is σ = 11793954816. Its totient is φ = 831312000.

The previous prime is 3661300009. The next prime is 3661300021. The reversal of 3661300020 is 200031663.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3661300020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661300021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34555 + ... + 92285.

It is an arithmetic number, because the mean of its divisors is an integer number (122853696).

Almost surely, 2^3661300020 is an apocalyptic number.

3661300020 is a gapful number since it is divisible by the number (30) 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 3661300020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5896977408).

3661300020 is an abundant number, since it is smaller than the sum of its proper divisors (8132654796).

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

3661300020 is a wasteful number, since it uses less digits than its factorization.

3661300020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57901 (or 57899 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 3661300020 is about 60508.6772289727. The cubic root of 3661300020 is about 1541.2689855313.

Adding to 3661300020 its reverse (200031663), we get a palindrome (3861331683).

The spelling of 3661300020 in words is "three billion, six hundred sixty-one million, three hundred thousand, twenty".