21214025054454 has 32 divisors (see below), whose sum is σ = 44509270659840. Its totient is φ = 6731340308000.

The previous prime is 21214025054419. The next prime is 21214025054459. The reversal of 21214025054454 is 45445052041212.

It is a super-2 number, since 2×21214025054454² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214025054459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 858576972 + ... + 858601679.

It is an arithmetic number, because the mean of its divisors is an integer number (1390914708120).

Almost surely, 2^{21214025054454} is an apocalyptic number.

21214025054454 is an abundant number, since it is smaller than the sum of its proper divisors (23295245605386).

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

21214025054454 is a wasteful number, since it uses less digits than its factorization.

21214025054454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717178756.

The product of its (nonzero) digits is 256000, while the sum is 39.

Adding to 21214025054454 its reverse (45445052041212), we get a palindrome (66659077095666).

The spelling of 21214025054454 in words is "twenty-one trillion, two hundred fourteen billion, twenty-five million, fifty-four thousand, four hundred fifty-four".