20111430040 has 32 divisors (see below), whose sum is σ = 48731543280. Its totient is φ = 7425758592.

The previous prime is 20111430037. The next prime is 20111430047. The reversal of 20111430040 is 4003411102.

It is a junction number, because it is equal to n+sod(n) for n = 20111429996 and 20111430023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111430047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19337394 + ... + 19338433.

Almost surely, 2^20111430040 is an apocalyptic number.

20111430040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111430040 is an abundant number, since it is smaller than the sum of its proper divisors (28620113240).

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

20111430040 is a wasteful number, since it uses less digits than its factorization.

20111430040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38675851 (or 38675847 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20111430040 its reverse (4003411102), we get a palindrome (24114841142).

The spelling of 20111430040 in words is "twenty billion, one hundred eleven million, four hundred thirty thousand, forty".