21437550073918 has 8 divisors (see below), whose sum is σ = 35079627393720. Its totient is φ = 9744340942680.

The previous prime is 21437550073909. The next prime is 21437550073931. The reversal of 21437550073918 is 81937005573412.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487217047113 + ... + 487217047156.

It is an arithmetic number, because the mean of its divisors is an integer number (4384953424215).

Almost surely, 2^{21437550073918} is an apocalyptic number.

21437550073918 is a deficient number, since it is larger than the sum of its proper divisors (13642077319802).

21437550073918 is a wasteful number, since it uses less digits than its factorization.

21437550073918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974434094282.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 21437550073918 in words is "twenty-one trillion, four hundred thirty-seven billion, five hundred fifty million, seventy-three thousand, nine hundred eighteen".