20123124040 has 32 divisors (see below), whose sum is σ = 45464922360. Its totient is φ = 8015846400.

The previous prime is 20123124037. The next prime is 20123124071. The reversal of 20123124040 is 4042132102.

It can be written as a sum of positive squares in 4 ways, for example, as 13594160836 + 6528963204 = 116594^2 + 80802^2 .

It is a super-2 number, since 2×20123124040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20123123999 and 20123124017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034091 + ... + 1053370.

Almost surely, 2^20123124040 is an apocalyptic number.

20123124040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123124040 is an abundant number, since it is smaller than the sum of its proper divisors (25341798320).

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

20123124040 is a wasteful number, since it uses less digits than its factorization.

20123124040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087713 (or 2087709 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20123124040 its reverse (4042132102), we get a palindrome (24165256142).

The spelling of 20123124040 in words is "twenty billion, one hundred twenty-three million, one hundred twenty-four thousand, forty".