21154521514030 has 32 divisors (see below), whose sum is σ = 38198717735040. Its totient is φ = 8435020688160.

The previous prime is 21154521514003. The next prime is 21154521514031. The reversal of 21154521514030 is 3041512545112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21154521514031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22534581 + ... + 23454559.

It is an arithmetic number, because the mean of its divisors is an integer number (1193709929220).

Almost surely, 2^{21154521514030} is an apocalyptic number.

21154521514030 is a deficient number, since it is larger than the sum of its proper divisors (17044196221010).

21154521514030 is a wasteful number, since it uses less digits than its factorization.

21154521514030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927264.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 21154521514030 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred twenty-one million, five hundred fourteen thousand, thirty".