210134140040 has 128 divisors (see below), whose sum is σ = 522589345920. Its totient is φ = 75409152000.

The previous prime is 210134140019. The next prime is 210134140049. The reversal of 210134140040 is 40041431012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 210134139994 and 210134140021.

It is not an unprimeable number, because it can be changed into a prime (210134140049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13902167 + ... + 13917273.

It is an arithmetic number, because the mean of its divisors is an integer number (4082729265).

Almost surely, 2^210134140040 is an apocalyptic number.

210134140040 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 210134140040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261294672960).

210134140040 is an abundant number, since it is smaller than the sum of its proper divisors (312455205880).

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

210134140040 is a wasteful number, since it uses less digits than its factorization.

210134140040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15543 (or 15539 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 210134140040 its reverse (40041431012), we get a palindrome (250175571052).

The spelling of 210134140040 in words is "two hundred ten billion, one hundred thirty-four million, one hundred forty thousand, forty".