25420893502 has 4 divisors (see below), whose sum is σ = 38131340256. Its totient is φ = 12710446750.

The previous prime is 25420893461. The next prime is 25420893503. The reversal of 25420893502 is 20539802452.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25420893503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6355223374 + ... + 6355223377.

It is an arithmetic number, because the mean of its divisors is an integer number (9532835064).

Almost surely, 2^25420893502 is an apocalyptic number.

25420893502 is a deficient number, since it is larger than the sum of its proper divisors (12710446754).

25420893502 is a wasteful number, since it uses less digits than its factorization.

25420893502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12710446753.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 25420893502 in words is "twenty-five billion, four hundred twenty million, eight hundred ninety-three thousand, five hundred two".