302120020 has 24 divisors (see below), whose sum is σ = 636466824. Its totient is φ = 120464256.

The previous prime is 302119997. The next prime is 302120029. The reversal of 302120020 is 20021203.

It can be written as a sum of positive squares in 4 ways, for example, as 611524 + 301508496 = 782^2 + 17364^2 .

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 = 302119979 and 302120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302120029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17487 + ... + 30166.

It is an arithmetic number, because the mean of its divisors is an integer number (26519451).

Almost surely, 2^302120020 is an apocalyptic number.

It is an amenable number.

302120020 is an abundant number, since it is smaller than the sum of its proper divisors (334346804).

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

302120020 is a wasteful number, since it uses less digits than its factorization.

302120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47979 (or 47977 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 302120020 is about 17381.6000414231. The cubic root of 302120020 is about 671.0061514639.

Adding to 302120020 its reverse (20021203), we get a palindrome (322141223).

The spelling of 302120020 in words is "three hundred two million, one hundred twenty thousand, twenty".