25340693820 has 48 divisors (see below), whose sum is σ = 76411940640. Its totient is φ = 6237709056.

The previous prime is 25340693753. The next prime is 25340693821. The reversal of 25340693820 is 2839604352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25340693821) 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 in 15 ways as a sum of consecutive naturals, for example, 16243255 + ... + 16244814.

It is an arithmetic number, because the mean of its divisors is an integer number (1591915430).

Almost surely, 2^25340693820 is an apocalyptic number.

25340693820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25340693820 is an abundant number, since it is smaller than the sum of its proper divisors (51071246820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25340693820 is a wasteful number, since it uses less digits than its factorization.

25340693820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32488094 (or 32488092 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 25340693820 in words is "twenty-five billion, three hundred forty million, six hundred ninety-three thousand, eight hundred twenty".