21254336155054 has 8 divisors (see below), whose sum is σ = 31894827058080. Its totient is φ = 10622727135696.

The previous prime is 21254336155007. The next prime is 21254336155139. The reversal of 21254336155054 is 45055163345212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21254336154995 and 21254336155013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2220464934 + ... + 2220474505.

It is an arithmetic number, because the mean of its divisors is an integer number (3986853382260).

Almost surely, 2^{21254336155054} is an apocalyptic number.

21254336155054 is a deficient number, since it is larger than the sum of its proper divisors (10640490903026).

21254336155054 is a wasteful number, since it uses less digits than its factorization.

21254336155054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440941834.

The product of its (nonzero) digits is 2160000, while the sum is 46.

The spelling of 21254336155054 in words is "twenty-one trillion, two hundred fifty-four billion, three hundred thirty-six million, one hundred fifty-five thousand, fifty-four".