20100234240 has 440 divisors, whose sum is σ = 76291558992. Its totient is φ = 5042995200.

The previous prime is 20100234239. The next prime is 20100234263. The reversal of 20100234240 is 4243200102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7048815 + ... + 7051665.

Almost surely, 2^20100234240 is an apocalyptic number.

20100234240 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 20100234240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38145779496).

20100234240 is an abundant number, since it is smaller than the sum of its proper divisors (56191324752).

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

20100234240 is a wasteful number, since it uses less digits than its factorization.

20100234240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905 (or 2878 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20100234240 its reverse (4243200102), we get a palindrome (24343434342).

The spelling of 20100234240 in words is "twenty billion, one hundred million, two hundred thirty-four thousand, two hundred forty".