25421250004 has 24 divisors (see below), whose sum is σ = 44640014720. Its totient is φ = 12667034016.

The previous prime is 25421249989. The next prime is 25421250061. The reversal of 25421250004 is 40005212452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1466017 + ... + 1483255.

Almost surely, 2^25421250004 is an apocalyptic number.

It is an amenable number.

25421250004 is a deficient number, since it is larger than the sum of its proper divisors (19218764716).

25421250004 is a wasteful number, since it uses less digits than its factorization.

25421250004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18487 (or 18485 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 25421250004 its reverse (40005212452), we get a palindrome (65426462456).

The spelling of 25421250004 in words is "twenty-five billion, four hundred twenty-one million, two hundred fifty thousand, four".