21214637328254 has 4 divisors (see below), whose sum is σ = 31821955992384. Its totient is φ = 10607318664126.

The previous prime is 21214637328233. The next prime is 21214637328301. The reversal of 21214637328254 is 45282373641212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303659332062 + ... + 5303659332065.

It is an arithmetic number, because the mean of its divisors is an integer number (7955488998096).

Almost surely, 2^{21214637328254} is an apocalyptic number.

21214637328254 is a deficient number, since it is larger than the sum of its proper divisors (10607318664130).

21214637328254 is a wasteful number, since it uses less digits than its factorization.

21214637328254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10607318664129.

The product of its digits is 3870720, while the sum is 50.

The spelling of 21214637328254 in words is "twenty-one trillion, two hundred fourteen billion, six hundred thirty-seven million, three hundred twenty-eight thousand, two hundred fifty-four".