20124100040 has 64 divisors (see below), whose sum is σ = 51995304000. Its totient is φ = 6932701440.

The previous prime is 20124100001. The next prime is 20124100049. The reversal of 20124100040 is 4000142102.

It is a junction number, because it is equal to n+sod(n) for n = 20124099988 and 20124100024.

It is not an unprimeable number, because it can be changed into a prime (20124100049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1195235 + ... + 1211954.

It is an arithmetic number, because the mean of its divisors is an integer number (812426625).

Almost surely, 2^20124100040 is an apocalyptic number.

20124100040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20124100040 is an abundant number, since it is smaller than the sum of its proper divisors (31871203960).

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

20124100040 is a wasteful number, since it uses less digits than its factorization.

20124100040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407230 (or 2407226 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20124100040 its reverse (4000142102), we get a palindrome (24124242142).

The spelling of 20124100040 in words is "twenty billion, one hundred twenty-four million, one hundred thousand, forty".