21524440654 has 8 divisors (see below), whose sum is σ = 32320757448. Its totient is φ = 10750854840.

The previous prime is 21524440633. The next prime is 21524440657. The reversal of 21524440654 is 45604442512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21524440657) 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 3 ways as a sum of consecutive naturals, for example, 5680377 + ... + 5684164.

It is an arithmetic number, because the mean of its divisors is an integer number (4040094681).

Almost surely, 2^21524440654 is an apocalyptic number.

21524440654 is a deficient number, since it is larger than the sum of its proper divisors (10796316794).

21524440654 is a wasteful number, since it uses less digits than its factorization.

21524440654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11365490.

The product of its (nonzero) digits is 153600, while the sum is 37.

The spelling of 21524440654 in words is "twenty-one billion, five hundred twenty-four million, four hundred forty thousand, six hundred fifty-four".