21923154533 has 12 divisors (see below), whose sum is σ = 25512187680. Its totient is φ = 18784096632.

The previous prime is 21923154509. The next prime is 21923154551. The reversal of 21923154533 is 33545132912.

It is not a de Polignac number, because 21923154533 - 2¹⁰ = 21923153509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21923154133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46160 + ... + 214422.

It is an arithmetic number, because the mean of its divisors is an integer number (2126015640).

Almost surely, 2^21923154533 is an apocalyptic number.

It is an amenable number.

21923154533 is a deficient number, since it is larger than the sum of its proper divisors (3589033147).

21923154533 is a wasteful number, since it uses less digits than its factorization.

21923154533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170936 (or 170929 counting only the distinct ones).

The product of its digits is 97200, while the sum is 38.

The spelling of 21923154533 in words is "twenty-one billion, nine hundred twenty-three million, one hundred fifty-four thousand, five hundred thirty-three".