21357173112474 has 16 divisors (see below), whose sum is σ = 42897669602112. Its totient is φ = 7088503807968.

The previous prime is 21357173112397. The next prime is 21357173112553. The reversal of 21357173112474 is 47421137175312.

It is a super-2 number, since 2×21357173112474² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7638472534 + ... + 7638475329.

It is an arithmetic number, because the mean of its divisors is an integer number (2681104350132).

Almost surely, 2^{21357173112474} is an apocalyptic number.

21357173112474 is an abundant number, since it is smaller than the sum of its proper divisors (21540496489638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21357173112474 is a wasteful number, since it uses less digits than its factorization.

21357173112474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15276948101.

The product of its digits is 987840, while the sum is 48.

The spelling of 21357173112474 in words is "twenty-one trillion, three hundred fifty-seven billion, one hundred seventy-three million, one hundred twelve thousand, four hundred seventy-four".