21799380435516 has 72 divisors (see below), whose sum is σ = 55174826672784. Its totient is φ = 7257123690240.

The previous prime is 21799380435509. The next prime is 21799380435541. The reversal of 21799380435516 is 61553408399712.

21799380435516 is a `hidden beast` number, since 2 + 1 + 7 + 9 + 9 + 3 + 80 + 4 + 35 + 516 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113078440 + ... + 113271056.

It is an arithmetic number, because the mean of its divisors is an integer number (766317037122).

It is a 2-persistent number, because it is pandigital, and so is 2⋅21799380435516 = 43598760871032, but 3⋅21799380435516 = 65398141306548 is not.

Almost surely, 2^{21799380435516} is an apocalyptic number.

It is an amenable number.

21799380435516 is an abundant number, since it is smaller than the sum of its proper divisors (33375446237268).

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

21799380435516 is a wasteful number, since it uses less digits than its factorization.

21799380435516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196651 (or 196646 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 63.

The spelling of 21799380435516 in words is "twenty-one trillion, seven hundred ninety-nine billion, three hundred eighty million, four hundred thirty-five thousand, five hundred sixteen".