20021313124 has 12 divisors (see below), whose sum is σ = 35039413948. Its totient is φ = 10010052000.

The previous prime is 20021313113. The next prime is 20021313157. The reversal of 20021313124 is 42131312002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5879822400 + 14141490724 = 76680^2 + 118918^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72027 + ... + 212674.

Almost surely, 2^20021313124 is an apocalyptic number.

It is an amenable number.

20021313124 is a deficient number, since it is larger than the sum of its proper divisors (15018100824).

20021313124 is a wasteful number, since it uses less digits than its factorization.

20021313124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302286 (or 302284 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20021313124 its reverse (42131312002), we get a palindrome (62152625126).

The spelling of 20021313124 in words is "twenty billion, twenty-one million, three hundred thirteen thousand, one hundred twenty-four".