21880001481782 has 16 divisors (see below), whose sum is σ = 32909286899952. Its totient is φ = 10910275813920.

The previous prime is 21880001481749. The next prime is 21880001481797. The reversal of 21880001481782 is 28718410008812.

It is a self number, because there is not a number n which added to its sum of digits gives 21880001481782.

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, 7962533 + ... + 10351904.

It is an arithmetic number, because the mean of its divisors is an integer number (2056830431247).

Almost surely, 2^{21880001481782} is an apocalyptic number.

21880001481782 is a deficient number, since it is larger than the sum of its proper divisors (11029285418170).

21880001481782 is a wasteful number, since it uses less digits than its factorization.

21880001481782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18316063.

The product of its (nonzero) digits is 458752, while the sum is 50.

The spelling of 21880001481782 in words is "twenty-one trillion, eight hundred eighty billion, one million, four hundred eighty-one thousand, seven hundred eighty-two".