20021000224 has 12 divisors (see below), whose sum is σ = 39416344254. Its totient is φ = 10010500096.

The previous prime is 20021000201. The next prime is 20021000267. The reversal of 20021000224 is 42200012002.

It can be written as a sum of positive squares in only one way, i.e., 16988515600 + 3032484624 = 130340^2 + 55068^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312828097 + ... + 312828160.

Almost surely, 2^20021000224 is an apocalyptic number.

It is an amenable number.

20021000224 is a deficient number, since it is larger than the sum of its proper divisors (19395344030).

20021000224 is an equidigital number, since it uses as much as digits as its factorization.

20021000224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625656267 (or 625656259 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20021000224 its reverse (42200012002), we get a palindrome (62221012226).

The spelling of 20021000224 in words is "twenty billion, twenty-one million, two hundred twenty-four", and thus it is an aban number.