21364123054570 has 16 divisors (see below), whose sum is σ = 38500189175520. Its totient is φ = 8535700849104.

The previous prime is 21364123054543. The next prime is 21364123054579. The reversal of 21364123054570 is 7545032146312.

It is not an unprimeable number, because it can be changed into a prime (21364123054579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1243537572 + ... + 1243554751.

It is an arithmetic number, because the mean of its divisors is an integer number (2406261823470).

Almost surely, 2^{21364123054570} is an apocalyptic number.

21364123054570 is a deficient number, since it is larger than the sum of its proper divisors (17136066120950).

21364123054570 is a wasteful number, since it uses less digits than its factorization.

21364123054570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487093189.

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 21364123054570 in words is "twenty-one trillion, three hundred sixty-four billion, one hundred twenty-three million, fifty-four thousand, five hundred seventy".