21327742117475 has 12 divisors (see below), whose sum is σ = 27838316027640. Its totient is φ = 16164183499200.

The previous prime is 21327742117457. The next prime is 21327742117483. The reversal of 21327742117475 is 57471124772312.

It is not a de Polignac number, because 21327742117475 - 2¹⁰ = 21327742116451 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22450254386 + ... + 22450255335.

It is an arithmetic number, because the mean of its divisors is an integer number (2319859668970).

Almost surely, 2^{21327742117475} is an apocalyptic number.

21327742117475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21327742117475 is a deficient number, since it is larger than the sum of its proper divisors (6510573910165).

21327742117475 is a wasteful number, since it uses less digits than its factorization.

21327742117475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44900509750 (or 44900509745 counting only the distinct ones).

The product of its digits is 4609920, while the sum is 53.

Adding to 21327742117475 its reverse (57471124772312), we get a palindrome (78798866889787).

The spelling of 21327742117475 in words is "twenty-one trillion, three hundred twenty-seven billion, seven hundred forty-two million, one hundred seventeen thousand, four hundred seventy-five".