20197635200 has 96 divisors (see below), whose sum is σ = 50740614000. Its totient is φ = 7942046720.

The previous prime is 20197635197. The next prime is 20197635203. The reversal of 20197635200 is 253679102.

It is an interprime number because it is at equal distance from previous prime (20197635197) and next prime (20197635203).

It is not an unprimeable number, because it can be changed into a prime (20197635203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135311 + ... + 242289.

Almost surely, 2^20197635200 is an apocalyptic number.

20197635200 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 20197635200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25370307000).

20197635200 is an abundant number, since it is smaller than the sum of its proper divisors (30542978800).

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

20197635200 is a wasteful number, since it uses less digits than its factorization.

20197635200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107062 (or 107045 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 20197635200 in words is "twenty billion, one hundred ninety-seven million, six hundred thirty-five thousand, two hundred".