21103414040 has 32 divisors (see below), whose sum is σ = 47487384000. Its totient is φ = 8440529664.

The previous prime is 21103414039. The next prime is 21103414061. The reversal of 21103414040 is 4041430112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527876 + ... + 566444.

It is an arithmetic number, because the mean of its divisors is an integer number (1483980750).

Almost surely, 2^21103414040 is an apocalyptic number.

21103414040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21103414040 is an abundant number, since it is smaller than the sum of its proper divisors (26383969960).

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

21103414040 is a wasteful number, since it uses less digits than its factorization.

21103414040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52259 (or 52255 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21103414040 its reverse (4041430112), we get a palindrome (25144844152).

The spelling of 21103414040 in words is "twenty-one billion, one hundred three million, four hundred fourteen thousand, forty".