21834066798831 has 16 divisors (see below), whose sum is σ = 33278749037568. Its totient is φ = 12473688309600.

The previous prime is 21834066798773. The next prime is 21834066798833. The reversal of 21834066798831 is 13889766043812.

It is not a de Polignac number, because 21834066798831 - 2²² = 21834062604527 is a prime.

It is a super-2 number, since 2×21834066798831² (a number of 27 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 121628580 + ... + 121807961.

It is an arithmetic number, because the mean of its divisors is an integer number (2079921814848).

Almost surely, 2^{21834066798831} is an apocalyptic number.

21834066798831 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21834066798831 is a deficient number, since it is larger than the sum of its proper divisors (11444682238737).

21834066798831 is a wasteful number, since it uses less digits than its factorization.

21834066798831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243440822.

The product of its (nonzero) digits is 83607552, while the sum is 66.

The spelling of 21834066798831 in words is "twenty-one trillion, eight hundred thirty-four billion, sixty-six million, seven hundred ninety-eight thousand, eight hundred thirty-one".