20067539399 has 4 divisors (see below), whose sum is σ = 20940041136. Its totient is φ = 19195037664.

The previous prime is 20067539369. The next prime is 20067539413. The reversal of 20067539399 is 99393576002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20067539399 is a prime.

It is a super-3 number, since 3×20067539399³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20067539399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20067539369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436250834 + ... + 436250879.

It is an arithmetic number, because the mean of its divisors is an integer number (5235010284).

Almost surely, 2^20067539399 is an apocalyptic number.

20067539399 is a deficient number, since it is larger than the sum of its proper divisors (872501737).

20067539399 is an equidigital number, since it uses as much as digits as its factorization.

20067539399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872501736.

The product of its (nonzero) digits is 2755620, while the sum is 53.

The spelling of 20067539399 in words is "twenty billion, sixty-seven million, five hundred thirty-nine thousand, three hundred ninety-nine".