21742584587950 has 24 divisors (see below), whose sum is σ = 40455462517272. Its totient is φ = 8693968204320.

The previous prime is 21742584587917. The next prime is 21742584587953. The reversal of 21742584587950 is 5978548524712.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21742584587953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76497504 + ... + 76781203.

It is an arithmetic number, because the mean of its divisors is an integer number (1685644271553).

Almost surely, 2^{21742584587950} is an apocalyptic number.

21742584587950 is a deficient number, since it is larger than the sum of its proper divisors (18712877929322).

21742584587950 is a wasteful number, since it uses less digits than its factorization.

21742584587950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153281556 (or 153281551 counting only the distinct ones).

The product of its (nonzero) digits is 225792000, while the sum is 67.

The spelling of 21742584587950 in words is "twenty-one trillion, seven hundred forty-two billion, five hundred eighty-four million, five hundred eighty-seven thousand, nine hundred fifty".