20743699200 has 648 divisors, whose sum is σ = 84384880272. Its totient is φ = 4459069440.

The previous prime is 20743699189. The next prime is 20743699201. The reversal of 20743699200 is 299634702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (20743699201) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15992952 + ... + 15994248.

Almost surely, 2^20743699200 is an apocalyptic number.

20743699200 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 20743699200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42192440136).

20743699200 is an abundant number, since it is smaller than the sum of its proper divisors (63641181072).

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

20743699200 is a wasteful number, since it uses less digits than its factorization.

20743699200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357 (or 1331 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The spelling of 20743699200 in words is "twenty billion, seven hundred forty-three million, six hundred ninety-nine thousand, two hundred".