20245400000 has 168 divisors, whose sum is σ = 57392389152. Its totient is φ = 6940800000.

The previous prime is 20245399997. The next prime is 20245400023. The reversal of 20245400000 is 454202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1392770 + ... + 1407230.

It is an arithmetic number, because the mean of its divisors is an integer number (341621364).

Almost surely, 2^20245400000 is an apocalyptic number.

20245400000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20245400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28696194576).

20245400000 is an abundant number, since it is smaller than the sum of its proper divisors (37146989152).

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

20245400000 is an frugal number, since it uses more digits than its factorization.

20245400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14505 (or 14475 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

Adding to 20245400000 its reverse (454202), we get a palindrome (20245854202).

The spelling of 20245400000 in words is "twenty billion, two hundred forty-five million, four hundred thousand".