21114705949257 has 8 divisors (see below), whose sum is σ = 28259986670784. Its totient is φ = 14022947930288.

The previous prime is 21114705949243. The next prime is 21114705949289. The reversal of 21114705949257 is 75294950741112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21114705949257 - 2⁴ = 21114705949241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21114705949197 and 21114705949206.

It is not an unprimeable number, because it can be changed into a prime (21114705949457) 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, 13380674718 + ... + 13380676295.

It is an arithmetic number, because the mean of its divisors is an integer number (3532498333848).

Almost surely, 2^{21114705949257} is an apocalyptic number.

It is an amenable number.

21114705949257 is a deficient number, since it is larger than the sum of its proper divisors (7145280721527).

21114705949257 is a wasteful number, since it uses less digits than its factorization.

21114705949257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26761351279.

The product of its (nonzero) digits is 6350400, while the sum is 57.

The spelling of 21114705949257 in words is "twenty-one trillion, one hundred fourteen billion, seven hundred five million, nine hundred forty-nine thousand, two hundred fifty-seven".