20540730321 has 24 divisors (see below), whose sum is σ = 29820960000. Its totient is φ = 13624300032.

The previous prime is 20540730319. The next prime is 20540730341. The reversal of 20540730321 is 12303704502.

20540730321 is a `hidden beast` number, since 20 + 540 + 73 + 0 + 32 + 1 = 666.

It is not a de Polignac number, because 20540730321 - 2¹ = 20540730319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20540730341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1443640 + ... + 1457798.

It is an arithmetic number, because the mean of its divisors is an integer number (1242540000).

Almost surely, 2^20540730321 is an apocalyptic number.

It is an amenable number.

20540730321 is a deficient number, since it is larger than the sum of its proper divisors (9280229679).

20540730321 is a wasteful number, since it uses less digits than its factorization.

20540730321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14973 (or 14970 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The spelling of 20540730321 in words is "twenty billion, five hundred forty million, seven hundred thirty thousand, three hundred twenty-one".