20495291200 has 42 divisors (see below), whose sum is σ = 50431229846. Its totient is φ = 8198115840.

The previous prime is 20495291189. The next prime is 20495291209. The reversal of 20495291200 is 219259402.

It can be written as a sum of positive squares in 3 ways, for example, as 82882816 + 20412408384 = 9104^2 + 142872^2 .

It is a super-2 number, since 2×20495291200² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20495291209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6403179 + ... + 6406378.

Almost surely, 2^20495291200 is an apocalyptic number.

20495291200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20495291200 is an abundant number, since it is smaller than the sum of its proper divisors (29935938646).

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

20495291200 is a wasteful number, since it uses less digits than its factorization.

20495291200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12809579 (or 12809564 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 20495291200 in words is "twenty billion, four hundred ninety-five million, two hundred ninety-one thousand, two hundred".