21442440313154 has 64 divisors (see below), whose sum is σ = 39160981094400. Its totient is φ = 8601259399488.

The previous prime is 21442440313067. The next prime is 21442440313207. The reversal of 21442440313154 is 45131304424412.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6746012 + ... + 9401784.

It is an arithmetic number, because the mean of its divisors is an integer number (611890329600).

Almost surely, 2^{21442440313154} is an apocalyptic number.

21442440313154 is a deficient number, since it is larger than the sum of its proper divisors (17718540781246).

21442440313154 is a wasteful number, since it uses less digits than its factorization.

21442440313154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656167.

The product of its (nonzero) digits is 184320, while the sum is 38.

Adding to 21442440313154 its reverse (45131304424412), we get a palindrome (66573744737566).

The spelling of 21442440313154 in words is "twenty-one trillion, four hundred forty-two billion, four hundred forty million, three hundred thirteen thousand, one hundred fifty-four".