21524142166530 has 32 divisors (see below), whose sum is σ = 53903938644864. Its totient is φ = 5490215972736.

The previous prime is 21524142166517. The next prime is 21524142166543. The reversal of 21524142166530 is 3566124142512.

It is an interprime number because it is at equal distance from previous prime (21524142166517) and next prime (21524142166543).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15597203779 + ... + 15597205158.

It is an arithmetic number, because the mean of its divisors is an integer number (1684498082652).

Almost surely, 2^{21524142166530} is an apocalyptic number.

21524142166530 is an abundant number, since it is smaller than the sum of its proper divisors (32379796478334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21524142166530 is a wasteful number, since it uses less digits than its factorization.

21524142166530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31194408970.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 21524142166530 in words is "twenty-one trillion, five hundred twenty-four billion, one hundred forty-two million, one hundred sixty-six thousand, five hundred thirty".