25021294847 has 4 divisors (see below), whose sum is σ = 25023285000. Its totient is φ = 25019304696.

The previous prime is 25021294843. The next prime is 25021294861. The reversal of 25021294847 is 74849212052.

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

It is a cyclic number.

It is not a de Polignac number, because 25021294847 - 2² = 25021294843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25021294798 and 25021294807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25021294843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976097 + ... + 1001402.

It is an arithmetic number, because the mean of its divisors is an integer number (6255821250).

Almost surely, 2^25021294847 is an apocalyptic number.

25021294847 is a deficient number, since it is larger than the sum of its proper divisors (1990153).

25021294847 is a wasteful number, since it uses less digits than its factorization.

25021294847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990152.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 25021294847 in words is "twenty-five billion, twenty-one million, two hundred ninety-four thousand, eight hundred forty-seven".