20619340800 has 396 divisors, whose sum is σ = 72470432280. Its totient is φ = 5169479680.

The previous prime is 20619340799. The next prime is 20619340801. The reversal of 20619340800 is 804391602.

It is an interprime number because it is at equal distance from previous prime (20619340799) and next prime (20619340801).

It is not an unprimeable number, because it can be changed into a prime (20619340801) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22194736 + ... + 22195664.

Almost surely, 2^20619340800 is an apocalyptic number.

20619340800 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 20619340800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36235216140).

20619340800 is an abundant number, since it is smaller than the sum of its proper divisors (51851091480).

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

20619340800 is a wasteful number, since it uses less digits than its factorization.

20619340800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 20619340800 in words is "twenty billion, six hundred nineteen million, three hundred forty thousand, eight hundred".