21995107040 has 48 divisors (see below), whose sum is σ = 52695347040. Its totient is φ = 8674122240.

The previous prime is 21995107039. The next prime is 21995107051. The reversal of 21995107040 is 4070159912.

It is a junction number, because it is equal to n+sod(n) for n = 21995106985 and 21995107003.

It is a congruent number.

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, 956735 + ... + 979454.

It is an arithmetic number, because the mean of its divisors is an integer number (1097819730).

Almost surely, 2^21995107040 is an apocalyptic number.

21995107040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21995107040 is an abundant number, since it is smaller than the sum of its proper divisors (30700240000).

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

21995107040 is a wasteful number, since it uses less digits than its factorization.

21995107040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936275 (or 1936267 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 21995107040 in words is "twenty-one billion, nine hundred ninety-five million, one hundred seven thousand, forty".