20533544242 has 16 divisors (see below), whose sum is σ = 31037169240. Its totient is φ = 10187993088.

The previous prime is 20533544237. The next prime is 20533544257. The reversal of 20533544242 is 24244533502.

It can be written as a sum of positive squares in 4 ways, for example, as 13231670841 + 7301873401 = 115029^2 + 85451^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20533544198 and 20533544207.

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, 198948 + ... + 283984.

Almost surely, 2^20533544242 is an apocalyptic number.

20533544242 is a deficient number, since it is larger than the sum of its proper divisors (10503624998).

20533544242 is a wasteful number, since it uses less digits than its factorization.

20533544242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85965.

The product of its (nonzero) digits is 115200, while the sum is 34.

The spelling of 20533544242 in words is "twenty billion, five hundred thirty-three million, five hundred forty-four thousand, two hundred forty-two".