21233554734 has 32 divisors (see below), whose sum is σ = 48568665600. Its totient is φ = 6062376672.

The previous prime is 21233554733. The next prime is 21233554801. The reversal of 21233554734 is 43745533212.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21233554692 and 21233554701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233554733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121929 + ... + 239444.

It is an arithmetic number, because the mean of its divisors is an integer number (1517770800).

Almost surely, 2^21233554734 is an apocalyptic number.

21233554734 is an abundant number, since it is smaller than the sum of its proper divisors (27335110866).

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

21233554734 is a wasteful number, since it uses less digits than its factorization.

21233554734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362784.

The product of its digits is 302400, while the sum is 39.

The spelling of 21233554734 in words is "twenty-one billion, two hundred thirty-three million, five hundred fifty-four thousand, seven hundred thirty-four".