20297844000 has 384 divisors, whose sum is σ = 84442176000. Its totient is φ = 4639334400.

The previous prime is 20297843999. The next prime is 20297844037. The reversal of 20297844000 is 44879202.

20297844000 is a `hidden beast` number, since 202 + 9 + 7 + 8 + 440 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 742576 + ... + 769424.

It is an arithmetic number, because the mean of its divisors is an integer number (219901500).

Almost surely, 2^20297844000 is an apocalyptic number.

20297844000 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 20297844000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42221088000).

20297844000 is an abundant number, since it is smaller than the sum of its proper divisors (64144332000).

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

20297844000 is a wasteful number, since it uses less digits than its factorization.

20297844000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26890 (or 26866 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 20297844000 in words is "twenty billion, two hundred ninety-seven million, eight hundred forty-four thousand".