20211442442 has 16 divisors (see below), whose sum is σ = 31131856392. Its totient is φ = 9837573120.

The previous prime is 20211442429. The next prime is 20211442457. The reversal of 20211442442 is 24424411202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8076437161 + 12135005281 = 89869^2 + 110159^2 .

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, 842123 + ... + 865790.

Almost surely, 2^20211442442 is an apocalyptic number.

20211442442 is a deficient number, since it is larger than the sum of its proper divisors (10920413950).

20211442442 is a wasteful number, since it uses less digits than its factorization.

20211442442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708073.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 20211442442 its reverse (24424411202), we get a palindrome (44635853644).

The spelling of 20211442442 in words is "twenty billion, two hundred eleven million, four hundred forty-two thousand, four hundred forty-two".