20836489452 has 48 divisors (see below), whose sum is σ = 50829676800. Its totient is φ = 6630769728.

The previous prime is 20836489411. The next prime is 20836489463. The reversal of 20836489452 is 25498463802.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20836489395 and 20836489404.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72174 + ... + 216522.

It is an arithmetic number, because the mean of its divisors is an integer number (1058951600).

Almost surely, 2^20836489452 is an apocalyptic number.

It is a pronic number, being equal to 144348×144349.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20836489452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25414838400).

20836489452 is an abundant number, since it is smaller than the sum of its proper divisors (29993187348).

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

20836489452 is a wasteful number, since it uses less digits than its factorization.

20836489452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144902 (or 144900 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 20836489452 in words is "twenty billion, eight hundred thirty-six million, four hundred eighty-nine thousand, four hundred fifty-two".