20996293500 has 768 divisors, whose sum is σ = 85045309440. Its totient is φ = 4408992000.

The previous prime is 20996293499. The next prime is 20996293511. The reversal of 20996293500 is 539269902.

20996293500 is a `hidden beast` number, since 209 + 96 + 2 + 9 + 350 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 99508395 + ... + 99508605.

It is an arithmetic number, because the mean of its divisors is an integer number (110736080).

Almost surely, 2^20996293500 is an apocalyptic number.

20996293500 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 20996293500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42522654720).

20996293500 is an abundant number, since it is smaller than the sum of its proper divisors (64049015940).

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

20996293500 is a wasteful number, since it uses less digits than its factorization.

20996293500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The spelling of 20996293500 in words is "twenty billion, nine hundred ninety-six million, two hundred ninety-three thousand, five hundred".