20507727400 has 96 divisors (see below), whose sum is σ = 48575239200. Its totient is φ = 8049657600.

The previous prime is 20507727391. The next prime is 20507727403. The reversal of 20507727400 is 472770502.

It is a super-2 number, since 2×20507727400² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20507727403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8648215 + ... + 8650585.

It is an arithmetic number, because the mean of its divisors is an integer number (505992075).

Almost surely, 2^20507727400 is an apocalyptic number.

20507727400 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 20507727400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24287619600).

20507727400 is an abundant number, since it is smaller than the sum of its proper divisors (28067511800).

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

20507727400 is a wasteful number, since it uses less digits than its factorization.

20507727400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3179 (or 3170 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 34.

The spelling of 20507727400 in words is "twenty billion, five hundred seven million, seven hundred twenty-seven thousand, four hundred".