21030714507057 has 4 divisors (see below), whose sum is σ = 28040952676080. Its totient is φ = 14020476338036.

The previous prime is 21030714507031. The next prime is 21030714507073. The reversal of 21030714507057 is 75070541703012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21030714507057 - 2¹⁴ = 21030714490673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21030714507017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3505119084507 + ... + 3505119084512.

It is an arithmetic number, because the mean of its divisors is an integer number (7010238169020).

Almost surely, 2^{21030714507057} is an apocalyptic number.

It is an amenable number.

21030714507057 is a deficient number, since it is larger than the sum of its proper divisors (7010238169023).

21030714507057 is an equidigital number, since it uses as much as digits as its factorization.

21030714507057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010238169022.

The product of its (nonzero) digits is 205800, while the sum is 42.

The spelling of 21030714507057 in words is "twenty-one trillion, thirty billion, seven hundred fourteen million, five hundred seven thousand, fifty-seven".