20544335442 has 24 divisors (see below), whose sum is σ = 44690078160. Its totient is φ = 6820827000.

The previous prime is 20544335437. The next prime is 20544335453. The reversal of 20544335442 is 24453344502.

20544335442 is a `hidden beast` number, since 20 + 54 + 43 + 3 + 544 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20544335397 and 20544335406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2269092 + ... + 2278127.

It is an arithmetic number, because the mean of its divisors is an integer number (1862086590).

Almost surely, 2^20544335442 is an apocalyptic number.

20544335442 is an abundant number, since it is smaller than the sum of its proper divisors (24145742718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20544335442 is a wasteful number, since it uses less digits than its factorization.

20544335442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547478 (or 4547475 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 36.

Adding to 20544335442 its reverse (24453344502), we get a palindrome (44997679944).

The spelling of 20544335442 in words is "twenty billion, five hundred forty-four million, three hundred thirty-five thousand, four hundred forty-two".