21941748575 has 12 divisors (see below), whose sum is σ = 27316173528. Its totient is φ = 17483460000.

The previous prime is 21941748553. The next prime is 21941748583. The reversal of 21941748575 is 57584714912.

It is a happy number.

It is not a de Polignac number, because 21941748575 - 2²⁸ = 21673313119 is a prime.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1742072 + ... + 1754621.

It is an arithmetic number, because the mean of its divisors is an integer number (2276347794).

Almost surely, 2^21941748575 is an apocalyptic number.

21941748575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21941748575 is a deficient number, since it is larger than the sum of its proper divisors (5374424953).

21941748575 is a wasteful number, since it uses less digits than its factorization.

21941748575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3496954 (or 3496949 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 53.

The spelling of 21941748575 in words is "twenty-one billion, nine hundred forty-one million, seven hundred forty-eight thousand, five hundred seventy-five".