21355342170274 has 32 divisors (see below), whose sum is σ = 38479699005696. Its totient is φ = 8690463386880.

The previous prime is 21355342170229. The next prime is 21355342170293. The reversal of 21355342170274 is 47207124355312.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242003107 + ... + 242091334.

It is an arithmetic number, because the mean of its divisors is an integer number (1202490593928).

Almost surely, 2^{21355342170274} is an apocalyptic number.

21355342170274 is a deficient number, since it is larger than the sum of its proper divisors (17124356835422).

21355342170274 is a wasteful number, since it uses less digits than its factorization.

21355342170274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484094610.

The product of its (nonzero) digits is 1411200, while the sum is 46.

The spelling of 21355342170274 in words is "twenty-one trillion, three hundred fifty-five billion, three hundred forty-two million, one hundred seventy thousand, two hundred seventy-four".