20283499408 has 80 divisors (see below), whose sum is σ = 42516854640. Its totient is φ = 9338421248.

The previous prime is 20283499387. The next prime is 20283499409. The reversal of 20283499408 is 80499438202.

It can be written as a sum of positive squares in 8 ways, for example, as 1093492624 + 19190006784 = 33068^2 + 138528^2 .

It is a super-2 number, since 2×20283499408² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20283499409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5606016 + ... + 5609632.

It is an arithmetic number, because the mean of its divisors is an integer number (531460683).

Almost surely, 2^20283499408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20283499408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21258427320).

20283499408 is an abundant number, since it is smaller than the sum of its proper divisors (22233355232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20283499408 is a wasteful number, since it uses less digits than its factorization.

20283499408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4084 (or 4078 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 20283499408 in words is "twenty billion, two hundred eighty-three million, four hundred ninety-nine thousand, four hundred eight".