20021010320 has 40 divisors (see below), whose sum is σ = 46585538424. Its totient is φ = 8002092032.

The previous prime is 20021010311. The next prime is 20021010337. The reversal of 20021010320 is 2301012002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2659258624 + 17361751696 = 51568^2 + 131764^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4172 + ... + 200148.

Almost surely, 2^20021010320 is an apocalyptic number.

20021010320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021010320 is an abundant number, since it is smaller than the sum of its proper divisors (26564528104).

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

20021010320 is a wasteful number, since it uses less digits than its factorization.

20021010320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197267 (or 197261 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20021010320 its reverse (2301012002), we get a palindrome (22322022322).

The spelling of 20021010320 in words is "twenty billion, twenty-one million, ten thousand, three hundred twenty".