21425234159054 has 32 divisors (see below), whose sum is σ = 35347220143200. Its totient is φ = 9659007590400.

The previous prime is 21425234159027. The next prime is 21425234159083. The reversal of 21425234159054 is 45095143252412.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2649827 + ... + 7062014.

It is an arithmetic number, because the mean of its divisors is an integer number (1104600629475).

Almost surely, 2^{21425234159054} is an apocalyptic number.

21425234159054 is a deficient number, since it is larger than the sum of its proper divisors (13921985984146).

21425234159054 is a wasteful number, since it uses less digits than its factorization.

21425234159054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712676.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 21425234159054 in words is "twenty-one trillion, four hundred twenty-five billion, two hundred thirty-four million, one hundred fifty-nine thousand, fifty-four".