20527740321 has 16 divisors (see below), whose sum is σ = 29910307008. Its totient is φ = 12419481600.

The previous prime is 20527740319. The next prime is 20527740349. The reversal of 20527740321 is 12304772502.

It is not a de Polignac number, because 20527740321 - 2¹ = 20527740319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20527740361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520000 + ... + 558081.

It is an arithmetic number, because the mean of its divisors is an integer number (1869394188).

Almost surely, 2^20527740321 is an apocalyptic number.

It is an amenable number.

20527740321 is a deficient number, since it is larger than the sum of its proper divisors (9382566687).

20527740321 is a wasteful number, since it uses less digits than its factorization.

20527740321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078672.

The product of its (nonzero) digits is 23520, while the sum is 33.

The spelling of 20527740321 in words is "twenty billion, five hundred twenty-seven million, seven hundred forty thousand, three hundred twenty-one".