21250225666342 has 16 divisors (see below), whose sum is σ = 32809864273920. Its totient is φ = 10317164340168.

The previous prime is 21250225666321. The next prime is 21250225666367. The reversal of 21250225666342 is 24366652205212.

It is a junction number, because it is equal to n+sod(n) for n = 21250225666292 and 21250225666301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890012592 + ... + 890036467.

It is an arithmetic number, because the mean of its divisors is an integer number (2050616517120).

Almost surely, 2^{21250225666342} is an apocalyptic number.

21250225666342 is a deficient number, since it is larger than the sum of its proper divisors (11559638607578).

21250225666342 is a wasteful number, since it uses less digits than its factorization.

21250225666342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780049235.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 21250225666342 in words is "twenty-one trillion, two hundred fifty billion, two hundred twenty-five million, six hundred sixty-six thousand, three hundred forty-two".