21693928930159 has 2 divisors, whose sum is σ = 21693928930160. Its totient is φ = 21693928930158.

The previous prime is 21693928930123. The next prime is 21693928930207. The reversal of 21693928930159 is 95103982939612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21693928930159 - 2¹⁹ = 21693928405871 is a prime.

It is a super-2 number, since 2×21693928930159² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21693928930094 and 21693928930103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21693928936159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10846964465079 + 10846964465080.

It is an arithmetic number, because the mean of its divisors is an integer number (10846964465080).

Almost surely, 2^{21693928930159} is an apocalyptic number.

21693928930159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21693928930159 is an equidigital number, since it uses as much as digits as its factorization.

21693928930159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56687040, while the sum is 67.

The spelling of 21693928930159 in words is "twenty-one trillion, six hundred ninety-three billion, nine hundred twenty-eight million, nine hundred thirty thousand, one hundred fifty-nine".