21494753558 has 8 divisors (see below), whose sum is σ = 32316939360. Its totient is φ = 10722440440.

The previous prime is 21494753551. The next prime is 21494753587. The reversal of 21494753558 is 85535749412.

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 (21494753551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12467093 + ... + 12468816.

It is an arithmetic number, because the mean of its divisors is an integer number (4039617420).

Almost surely, 2^21494753558 is an apocalyptic number.

21494753558 is a deficient number, since it is larger than the sum of its proper divisors (10822185802).

21494753558 is a wasteful number, since it uses less digits than its factorization.

21494753558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24936342.

The product of its digits is 6048000, while the sum is 53.

The spelling of 21494753558 in words is "twenty-one billion, four hundred ninety-four million, seven hundred fifty-three thousand, five hundred fifty-eight".