20211043042 has 8 divisors (see below), whose sum is σ = 30446679276. Its totient is φ = 10062149952.

The previous prime is 20211043031. The next prime is 20211043117. The reversal of 20211043042 is 24034011202.

It can be written as a sum of positive squares in 2 ways, for example, as 16522788681 + 3688254361 = 128541^2 + 60731^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20211043042² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21685203 + ... + 21686134.

Almost surely, 2^20211043042 is an apocalyptic number.

20211043042 is a deficient number, since it is larger than the sum of its proper divisors (10235636234).

20211043042 is a wasteful number, since it uses less digits than its factorization.

20211043042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43371572.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20211043042 its reverse (24034011202), we get a palindrome (44245054244).

The spelling of 20211043042 in words is "twenty billion, two hundred eleven million, forty-three thousand, forty-two".