25070523821 has 4 divisors (see below), whose sum is σ = 28652027232. Its totient is φ = 21489020412.

The previous prime is 25070523811. The next prime is 25070523839. The reversal of 25070523821 is 12832507052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25070523821 - 2²² = 25066329517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25070523811) 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, 1790751695 + ... + 1790751708.

It is an arithmetic number, because the mean of its divisors is an integer number (7163006808).

Almost surely, 2^25070523821 is an apocalyptic number.

It is an amenable number.

25070523821 is a deficient number, since it is larger than the sum of its proper divisors (3581503411).

25070523821 is an equidigital number, since it uses as much as digits as its factorization.

25070523821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581503410.

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 25070523821 in words is "twenty-five billion, seventy million, five hundred twenty-three thousand, eight hundred twenty-one".