20349669600 has 216 divisors, whose sum is σ = 77278225752. Its totient is φ = 5009126400.

The previous prime is 20349669569. The next prime is 20349669611. The reversal of 20349669600 is 696694302.

20349669600 is a `hidden beast` number, since 2 + 0 + 34 + 9 + 6 + 6 + 9 + 600 = 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 35 ways as a sum of consecutive naturals, for example, 15106 + ... + 202305.

Almost surely, 2^20349669600 is an apocalyptic number.

20349669600 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 20349669600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38639112876).

20349669600 is an abundant number, since it is smaller than the sum of its proper divisors (56928556152).

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

20349669600 is a wasteful number, since it uses less digits than its factorization.

20349669600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217450 (or 217434 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 20349669600 in words is "twenty billion, three hundred forty-nine million, six hundred sixty-nine thousand, six hundred".