20390809410 has 96 divisors (see below), whose sum is σ = 54809314560. Its totient is φ = 5256244224.

The previous prime is 20390809403. The next prime is 20390809427. The reversal of 20390809410 is 1490809302.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 348231 + ... + 402549.

It is an arithmetic number, because the mean of its divisors is an integer number (570930360).

Almost surely, 2^20390809410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20390809410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27404657280).

20390809410 is an abundant number, since it is smaller than the sum of its proper divisors (34418505150).

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

20390809410 is a wasteful number, since it uses less digits than its factorization.

20390809410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54472 (or 54469 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 20390809410 in words is "twenty billion, three hundred ninety million, eight hundred nine thousand, four hundred ten".