21154545445030 has 16 divisors (see below), whose sum is σ = 38122822123344. Its totient is φ = 8451898106400.

The previous prime is 21154545445003. The next prime is 21154545445069. The reversal of 21154545445030 is 3054454545112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239999996 + ... + 1240017055.

It is an arithmetic number, because the mean of its divisors is an integer number (2382676382709).

Almost surely, 2^{21154545445030} is an apocalyptic number.

21154545445030 is a deficient number, since it is larger than the sum of its proper divisors (16968276678314).

21154545445030 is a wasteful number, since it uses less digits than its factorization.

21154545445030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480017911.

The product of its (nonzero) digits is 960000, while the sum is 43.

The spelling of 21154545445030 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred forty-five million, four hundred forty-five thousand, thirty".