20283439547 has 8 divisors (see below), whose sum is σ = 23192219136. Its totient is φ = 17377446312.

The previous prime is 20283439543. The next prime is 20283439559. The reversal of 20283439547 is 74593438202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20283439547 - 2² = 20283439543 is a prime.

It is a super-2 number, since 2×20283439547² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20283439543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680963 + ... + 710124.

It is an arithmetic number, because the mean of its divisors is an integer number (2899027392).

Almost surely, 2^20283439547 is an apocalyptic number.

20283439547 is a deficient number, since it is larger than the sum of its proper divisors (2908779589).

20283439547 is a wasteful number, since it uses less digits than its factorization.

20283439547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393177.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 20283439547 in words is "twenty billion, two hundred eighty-three million, four hundred thirty-nine thousand, five hundred forty-seven".