21253254214 has 16 divisors (see below), whose sum is σ = 32837890176. Its totient is φ = 10310155200.

The previous prime is 21253254193. The next prime is 21253254223. The reversal of 21253254214 is 41245235212.

It is a happy number.

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, 701142 + ... + 730825.

It is an arithmetic number, because the mean of its divisors is an integer number (2052368136).

Almost surely, 2^21253254214 is an apocalyptic number.

21253254214 is a deficient number, since it is larger than the sum of its proper divisors (11584635962).

21253254214 is a wasteful number, since it uses less digits than its factorization.

21253254214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432191.

The product of its digits is 19200, while the sum is 31.

Adding to 21253254214 its reverse (41245235212), we get a palindrome (62498489426).

The spelling of 21253254214 in words is "twenty-one billion, two hundred fifty-three million, two hundred fifty-four thousand, two hundred fourteen".