20283861504439 has 4 divisors (see below), whose sum is σ = 21844158543256. Its totient is φ = 18723564465624.

The previous prime is 20283861504419. The next prime is 20283861504461. The reversal of 20283861504439 is 93440516838202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20283861504439 - 2⁵ = 20283861504407 is a prime.

It is a super-2 number, since 2×20283861504439² (a number of 27 digits) contains 22 as substring.

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 20283861504439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20283861504419) 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, 780148519389 + ... + 780148519414.

It is an arithmetic number, because the mean of its divisors is an integer number (5461039635814).

Almost surely, 2^{20283861504439} is an apocalyptic number.

20283861504439 is a deficient number, since it is larger than the sum of its proper divisors (1560297038817).

20283861504439 is a wasteful number, since it uses less digits than its factorization.

20283861504439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560297038816.

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 20283861504439 in words is "twenty trillion, two hundred eighty-three billion, eight hundred sixty-one million, five hundred four thousand, four hundred thirty-nine".