21233545734 has 16 divisors (see below), whose sum is σ = 44965155888. Its totient is φ = 6661504512.

The previous prime is 21233545709. The next prime is 21233545747. The reversal of 21233545734 is 43754533212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21233545692 and 21233545701.

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, 104085907 + ... + 104086110.

It is an arithmetic number, because the mean of its divisors is an integer number (2810322243).

Almost surely, 2^21233545734 is an apocalyptic number.

21233545734 is an abundant number, since it is smaller than the sum of its proper divisors (23731610154).

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

21233545734 is a wasteful number, since it uses less digits than its factorization.

21233545734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208172039.

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

The spelling of 21233545734 in words is "twenty-one billion, two hundred thirty-three million, five hundred forty-five thousand, seven hundred thirty-four".