24920813945 has 4 divisors (see below), whose sum is σ = 29904976740. Its totient is φ = 19936651152.

The previous prime is 24920813903. The next prime is 24920813963. The reversal of 24920813945 is 54931802942.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7010880361 + 17909933584 = 83731^2 + 133828^2 .

It is a cyclic number.

It is not a de Polignac number, because 24920813945 - 2¹⁸ = 24920551801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 24920813945.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2492081390 + ... + 2492081399.

It is an arithmetic number, because the mean of its divisors is an integer number (7476244185).

Almost surely, 2^24920813945 is an apocalyptic number.

It is an amenable number.

24920813945 is a deficient number, since it is larger than the sum of its proper divisors (4984162795).

24920813945 is an equidigital number, since it uses as much as digits as its factorization.

24920813945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984162794.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 24920813945 in words is "twenty-four billion, nine hundred twenty million, eight hundred thirteen thousand, nine hundred forty-five".