21834066798830 has 64 divisors (see below), whose sum is σ = 46406557568448. Its totient is φ = 7291714805760.

The previous prime is 21834066798773. The next prime is 21834066798833. The reversal of 21834066798830 is 3889766043812.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21834066798833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38471027 + ... + 39034446.

It is an arithmetic number, because the mean of its divisors is an integer number (725102462007).

Almost surely, 2^{21834066798830} is an apocalyptic number.

21834066798830 is an abundant number, since it is smaller than the sum of its proper divisors (24572490769618).

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

21834066798830 is a wasteful number, since it uses less digits than its factorization.

21834066798830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77505701.

The product of its (nonzero) digits is 83607552, while the sum is 65.

The spelling of 21834066798830 in words is "twenty-one trillion, eight hundred thirty-four billion, sixty-six million, seven hundred ninety-eight thousand, eight hundred thirty".