20791915000 has 80 divisors (see below), whose sum is σ = 49303374120. Its totient is φ = 8216400000.

The previous prime is 20791914989. The next prime is 20791915009. The reversal of 20791915000 is 51919702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20791915009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 389950 + ... + 440050.

Almost surely, 2^20791915000 is an apocalyptic number.

20791915000 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 20791915000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24651687060).

20791915000 is an abundant number, since it is smaller than the sum of its proper divisors (28511459120).

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

20791915000 is an equidigital number, since it uses as much as digits as its factorization.

20791915000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50210 (or 50191 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 34.

The spelling of 20791915000 in words is "twenty billion, seven hundred ninety-one million, nine hundred fifteen thousand".