21545364313 has 16 divisors (see below), whose sum is σ = 24328512000. Its totient is φ = 18900407680.

The previous prime is 21545364301. The next prime is 21545364359. The reversal of 21545364313 is 31346354512.

It is not a de Polignac number, because 21545364313 - 2¹³ = 21545356121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21545394313) 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, 563013 + ... + 600061.

It is an arithmetic number, because the mean of its divisors is an integer number (1520532000).

Almost surely, 2^21545364313 is an apocalyptic number.

It is an amenable number.

21545364313 is a deficient number, since it is larger than the sum of its proper divisors (2783147687).

21545364313 is a wasteful number, since it uses less digits than its factorization.

21545364313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38912.

The product of its digits is 129600, while the sum is 37.

The spelling of 21545364313 in words is "twenty-one billion, five hundred forty-five million, three hundred sixty-four thousand, three hundred thirteen".