21149418235 has 8 divisors (see below), whose sum is σ = 27686511216. Its totient is φ = 15381395040.

The previous prime is 21149418233. The next prime is 21149418247. The reversal of 21149418235 is 53281494112.

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

It is not a de Polignac number, because 21149418235 - 2¹ = 21149418233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21149418233) 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 7 ways as a sum of consecutive naturals, for example, 192267384 + ... + 192267493.

It is an arithmetic number, because the mean of its divisors is an integer number (3460813902).

Almost surely, 2^21149418235 is an apocalyptic number.

21149418235 is a deficient number, since it is larger than the sum of its proper divisors (6537092981).

21149418235 is a wasteful number, since it uses less digits than its factorization.

21149418235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384534893.

The product of its digits is 69120, while the sum is 40.

The spelling of 21149418235 in words is "twenty-one billion, one hundred forty-nine million, four hundred eighteen thousand, two hundred thirty-five".