21354555120254 has 8 divisors (see below), whose sum is σ = 32032007170488. Its totient is φ = 10677219396760.

The previous prime is 21354555120203. The next prime is 21354555120307. The reversal of 21354555120254 is 45202155545312.

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

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, 28621292 + ... + 29357919.

It is an arithmetic number, because the mean of its divisors is an integer number (4004000896311).

Almost surely, 2^{21354555120254} is an apocalyptic number.

21354555120254 is a deficient number, since it is larger than the sum of its proper divisors (10677452050234).

21354555120254 is a wasteful number, since it uses less digits than its factorization.

21354555120254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58163370.

The product of its (nonzero) digits is 1200000, while the sum is 44.

The spelling of 21354555120254 in words is "twenty-one trillion, three hundred fifty-four billion, five hundred fifty-five million, one hundred twenty thousand, two hundred fifty-four".