20486267380 has 12 divisors (see below), whose sum is σ = 43021161540. Its totient is φ = 8194506944.

The previous prime is 20486267369. The next prime is 20486267383. The reversal of 20486267380 is 8376268402.

It can be written as a sum of positive squares in 2 ways, for example, as 7889347684 + 12596919696 = 88822^2 + 112236^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20486267380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20486267383) 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, 512156665 + ... + 512156704.

It is an arithmetic number, because the mean of its divisors is an integer number (3585096795).

Almost surely, 2^20486267380 is an apocalyptic number.

20486267380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20486267380 is an abundant number, since it is smaller than the sum of its proper divisors (22534894160).

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

20486267380 is a wasteful number, since it uses less digits than its factorization.

20486267380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024313378 (or 1024313376 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 20486267380 in words is "twenty billion, four hundred eighty-six million, two hundred sixty-seven thousand, three hundred eighty".