21442152174 has 16 divisors (see below), whose sum is σ = 43524369408. Its totient is φ = 7040706552.

The previous prime is 21442152131. The next prime is 21442152191. The reversal of 21442152174 is 47125124412.

It is a congruent number.

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, 26668942 + ... + 26669745.

It is an arithmetic number, because the mean of its divisors is an integer number (2720273088).

Almost surely, 2^21442152174 is an apocalyptic number.

21442152174 is an abundant number, since it is smaller than the sum of its proper divisors (22082217234).

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

21442152174 is a wasteful number, since it uses less digits than its factorization.

21442152174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53338759.

The product of its digits is 17920, while the sum is 33.

Adding to 21442152174 its reverse (47125124412), we get a palindrome (68567276586).

The spelling of 21442152174 in words is "twenty-one billion, four hundred forty-two million, one hundred fifty-two thousand, one hundred seventy-four".