21485781527374 has 8 divisors (see below), whose sum is σ = 32234775066288. Its totient is φ = 10740856505280.

The previous prime is 21485781527347. The next prime is 21485781527389. The reversal of 21485781527374 is 47372518758412.

It is a happy number.

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

It is a super-2 number, since 2×21485781527374² (a number of 27 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1017116002 + ... + 1017137125.

It is an arithmetic number, because the mean of its divisors is an integer number (4029346883286).

Almost surely, 2^{21485781527374} is an apocalyptic number.

21485781527374 is a deficient number, since it is larger than the sum of its proper divisors (10748993538914).

21485781527374 is a wasteful number, since it uses less digits than its factorization.

21485781527374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034258410.

The product of its digits is 105369600, while the sum is 64.

The spelling of 21485781527374 in words is "twenty-one trillion, four hundred eighty-five billion, seven hundred eighty-one million, five hundred twenty-seven thousand, three hundred seventy-four".