21574111737445 has 8 divisors (see below), whose sum is σ = 25889042879640. Its totient is φ = 17259216860160.

The previous prime is 21574111737439. The next prime is 21574111737617. The reversal of 21574111737445 is 54473711147512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1087100254881 + 20487011482564 = 1042641^2 + 4526258^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21574111737445 - 2⁷ = 21574111737317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21574111737392 and 21574111737401.

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, 7739796 + ... + 10151485.

It is an arithmetic number, because the mean of its divisors is an integer number (3236130359955).

Almost surely, 2^{21574111737445} is an apocalyptic number.

It is an amenable number.

21574111737445 is a deficient number, since it is larger than the sum of its proper divisors (4314931142195).

21574111737445 is a wasteful number, since it uses less digits than its factorization.

21574111737445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18132455.

The product of its digits is 3292800, while the sum is 52.

The spelling of 21574111737445 in words is "twenty-one trillion, five hundred seventy-four billion, one hundred eleven million, seven hundred thirty-seven thousand, four hundred forty-five".