21070523530779 has 16 divisors (see below), whose sum is σ = 28390289648160. Its totient is φ = 13899629053440.

The previous prime is 21070523530769. The next prime is 21070523530781. The reversal of 21070523530779 is 97703532507012.

It is a de Polignac number, because none of the positive numbers 2^k-21070523530779 is a prime.

It is a super-2 number, since 2×21070523530779² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21070523530739) 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, 92699184 + ... + 92926205.

It is an arithmetic number, because the mean of its divisors is an integer number (1774393103010).

Almost surely, 2^{21070523530779} is an apocalyptic number.

21070523530779 is a deficient number, since it is larger than the sum of its proper divisors (7319766117381).

21070523530779 is a wasteful number, since it uses less digits than its factorization.

21070523530779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185625790.

The product of its (nonzero) digits is 2778300, while the sum is 51.

The spelling of 21070523530779 in words is "twenty-one trillion, seventy billion, five hundred twenty-three million, five hundred thirty thousand, seven hundred seventy-nine".