21245258814434 has 16 divisors (see below), whose sum is σ = 31872800181600. Its totient is φ = 10620992239200.

The previous prime is 21245258814433. The next prime is 21245258814467. The reversal of 21245258814434 is 43441885254212.

It is a super-2 number, since 2×21245258814434² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21245258814433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475976582 + ... + 476021214.

It is an arithmetic number, because the mean of its divisors is an integer number (1992050011350).

Almost surely, 2^{21245258814434} is an apocalyptic number.

21245258814434 is a deficient number, since it is larger than the sum of its proper divisors (10627541367166).

21245258814434 is a wasteful number, since it uses less digits than its factorization.

21245258814434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75985.

The product of its digits is 9830400, while the sum is 53.

The spelling of 21245258814434 in words is "twenty-one trillion, two hundred forty-five billion, two hundred fifty-eight million, eight hundred fourteen thousand, four hundred thirty-four".