20021500304 has 60 divisors (see below), whose sum is σ = 44476161156. Its totient is φ = 8697102336.

The previous prime is 20021500277. The next prime is 20021500309. The reversal of 20021500304 is 40300512002.

It can be written as a sum of positive squares in 6 ways, for example, as 1074528400 + 18946971904 = 32780^2 + 137648^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (20021500309) 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, 171809 + ... + 263744.

Almost surely, 2^20021500304 is an apocalyptic number.

It is an amenable number.

20021500304 is an abundant number, since it is smaller than the sum of its proper divisors (24454660852).

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

20021500304 is a wasteful number, since it uses less digits than its factorization.

20021500304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435604 (or 435585 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The spelling of 20021500304 in words is "twenty billion, twenty-one million, five hundred thousand, three hundred four".