21365035147357 has 16 divisors (see below), whose sum is σ = 23937827889600. Its totient is φ = 18897354397440.

The previous prime is 21365035147343. The next prime is 21365035147381. The reversal of 21365035147357 is 75374153056312.

It is a cyclic number.

It is not a de Polignac number, because 21365035147357 - 2²⁷ = 21364900929629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21365035147327) 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, 16455994 + ... + 17706772.

It is an arithmetic number, because the mean of its divisors is an integer number (1496114243100).

Almost surely, 2^{21365035147357} is an apocalyptic number.

It is an amenable number.

21365035147357 is a deficient number, since it is larger than the sum of its proper divisors (2572792742243).

21365035147357 is a wasteful number, since it uses less digits than its factorization.

21365035147357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292796.

The product of its (nonzero) digits is 7938000, while the sum is 52.

The spelling of 21365035147357 in words is "twenty-one trillion, three hundred sixty-five billion, thirty-five million, one hundred forty-seven thousand, three hundred fifty-seven".