20530544340 has 48 divisors (see below), whose sum is σ = 57519177408. Its totient is φ = 5471606784.

The previous prime is 20530544339. The next prime is 20530544347. The reversal of 20530544340 is 4344503502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20530544298 and 20530544307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530544347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4084 + ... + 202676.

It is an arithmetic number, because the mean of its divisors is an integer number (1198316196).

Almost surely, 2^20530544340 is an apocalyptic number.

20530544340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20530544340 is an abundant number, since it is smaller than the sum of its proper divisors (36988633068).

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

20530544340 is a wasteful number, since it uses less digits than its factorization.

20530544340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200328 (or 200326 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 30.

The spelling of 20530544340 in words is "twenty billion, five hundred thirty million, five hundred forty-four thousand, three hundred forty".