21202534612464 has 40 divisors (see below), whose sum is σ = 55938601962240. Its totient is φ = 6917138950848.

The previous prime is 21202534612463. The next prime is 21202534612543. The reversal of 21202534612464 is 46421643520212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202534612463) 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, 4699141054 + ... + 4699145565.

It is an arithmetic number, because the mean of its divisors is an integer number (1398465049056).

Almost surely, 2^{21202534612464} is an apocalyptic number.

21202534612464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21202534612464 is an abundant number, since it is smaller than the sum of its proper divisors (34736067349776).

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

21202534612464 is a wasteful number, since it uses less digits than its factorization.

21202534612464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9398286677 (or 9398286671 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 21202534612464 in words is "twenty-one trillion, two hundred two billion, five hundred thirty-four million, six hundred twelve thousand, four hundred sixty-four".