20277729400 has 24 divisors (see below), whose sum is σ = 47145721320. Its totient is φ = 8111091680.

The previous prime is 20277729383. The next prime is 20277729403. The reversal of 20277729400 is 492777202.

It is a super-2 number, since 2×20277729400² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20277729403) 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, 50694124 + ... + 50694523.

It is an arithmetic number, because the mean of its divisors is an integer number (1964405055).

Almost surely, 2^20277729400 is an apocalyptic number.

20277729400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20277729400 is an abundant number, since it is smaller than the sum of its proper divisors (26867991920).

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

20277729400 is a wasteful number, since it uses less digits than its factorization.

20277729400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101388663 (or 101388654 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

The spelling of 20277729400 in words is "twenty billion, two hundred seventy-seven million, seven hundred twenty-nine thousand, four hundred".