21404114040 has 32 divisors (see below), whose sum is σ = 64212342480. Its totient is φ = 5707763712.

The previous prime is 21404114003. The next prime is 21404114041. The reversal of 21404114040 is 4041140412.

It is a junction number, because it is equal to n+sod(n) for n = 21404113998 and 21404114016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404114041) 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, 89183689 + ... + 89183928.

Almost surely, 2^21404114040 is an apocalyptic number.

21404114040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21404114040 is an abundant number, since it is smaller than the sum of its proper divisors (42808228440).

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

21404114040 is a wasteful number, since it uses less digits than its factorization.

21404114040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178367631 (or 178367627 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21404114040 its reverse (4041140412), we get a palindrome (25445254452).

The spelling of 21404114040 in words is "twenty-one billion, four hundred four million, one hundred fourteen thousand, forty".