21515410552030 has 64 divisors (see below), whose sum is σ = 39320700756480. Its totient is φ = 8475417618304.

The previous prime is 21515410552003. The next prime is 21515410552043. The reversal of 21515410552030 is 3025501451512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257754441 + ... + 257837899.

It is an arithmetic number, because the mean of its divisors is an integer number (614385949320).

Almost surely, 2^{21515410552030} is an apocalyptic number.

21515410552030 is a deficient number, since it is larger than the sum of its proper divisors (17805290204450).

21515410552030 is a wasteful number, since it uses less digits than its factorization.

21515410552030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84993.

The product of its (nonzero) digits is 30000, while the sum is 34.

The spelling of 21515410552030 in words is "twenty-one trillion, five hundred fifteen billion, four hundred ten million, five hundred fifty-two thousand, thirty".