21354555374450 has 48 divisors (see below), whose sum is σ = 39735764623296. Its totient is φ = 8538319502400.

The previous prime is 21354555374419. The next prime is 21354555374461. The reversal of 21354555374450 is 5447355545312.

21354555374450 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21354555374392 and 21354555374401.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2240061884 + ... + 2240071416.

It is an arithmetic number, because the mean of its divisors is an integer number (827828429652).

Almost surely, 2^{21354555374450} is an apocalyptic number.

21354555374450 is a deficient number, since it is larger than the sum of its proper divisors (18381209248846).

21354555374450 is a wasteful number, since it uses less digits than its factorization.

21354555374450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23219 (or 23214 counting only the distinct ones).

The product of its (nonzero) digits is 25200000, while the sum is 53.

The spelling of 21354555374450 in words is "twenty-one trillion, three hundred fifty-four billion, five hundred fifty-five million, three hundred seventy-four thousand, four hundred fifty".