21246525675 has 36 divisors (see below), whose sum is σ = 38113966800. Its totient is φ = 11313888960.

The previous prime is 21246525661. The next prime is 21246525697. The reversal of 21246525675 is 57652564212.

21246525675 is a `hidden beast` number, since 2 + 1 + 24 + 65 + 2 + 567 + 5 = 666.

It is not a de Polignac number, because 21246525675 - 2⁹ = 21246525163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21246525675.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 72601 + ... + 218549.

It is an arithmetic number, because the mean of its divisors is an integer number (1058721300).

Almost surely, 2^21246525675 is an apocalyptic number.

21246525675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21246525675 is a deficient number, since it is larger than the sum of its proper divisors (16867441125).

21246525675 is a wasteful number, since it uses less digits than its factorization.

21246525675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146612 (or 146604 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 21246525675 in words is "twenty-one billion, two hundred forty-six million, five hundred twenty-five thousand, six hundred seventy-five".