20544427121040 has 60 divisors (see below), whose sum is σ = 68995034417244. Its totient is φ = 5478513898752.

The previous prime is 20544427121039. The next prime is 20544427121047. The reversal of 20544427121040 is 4012172444502.

20544427121040 is a `hidden beast` number, since 2 + 0 + 54 + 442 + 7 + 121 + 0 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15631838578944 + 4912588542096 = 3953712^2 + 2216436^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20544427120986 and 20544427121004.

It is not an unprimeable number, because it can be changed into a prime (20544427121047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14266962559 + ... + 14266963998.

Almost surely, 2^{20544427121040} is an apocalyptic number.

20544427121040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20544427121040 is an abundant number, since it is smaller than the sum of its proper divisors (48450607296204).

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

20544427121040 is a wasteful number, since it uses less digits than its factorization.

20544427121040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28533926576 (or 28533926567 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 36.

Adding to 20544427121040 its reverse (4012172444502), we get a palindrome (24556599565542).

The spelling of 20544427121040 in words is "twenty trillion, five hundred forty-four billion, four hundred twenty-seven million, one hundred twenty-one thousand, forty".