21742638030425 has 24 divisors (see below), whose sum is σ = 29111393418240. Its totient is φ = 16013737454400.

The previous prime is 21742638030401. The next prime is 21742638030427. The reversal of 21742638030425 is 52403083624712.

It is not a de Polignac number, because 21742638030425 - 2¹⁸ = 21742637768281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21742638030425.

It is not an unprimeable number, because it can be changed into a prime (21742638030427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88135961 + ... + 88382310.

It is an arithmetic number, because the mean of its divisors is an integer number (1212974725760).

Almost surely, 2^{21742638030425} is an apocalyptic number.

21742638030425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21742638030425 is a deficient number, since it is larger than the sum of its proper divisors (7368755387815).

21742638030425 is a wasteful number, since it uses less digits than its factorization.

21742638030425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176518673 (or 176518668 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 47.

The spelling of 21742638030425 in words is "twenty-one trillion, seven hundred forty-two billion, six hundred thirty-eight million, thirty thousand, four hundred twenty-five".