25205212940 has 24 divisors (see below), whose sum is σ = 53281489632. Its totient is φ = 10015315200.

The previous prime is 25205212937. The next prime is 25205212961. The reversal of 25205212940 is 4921250252.

It is a junction number, because it is equal to n+sod(n) for n = 25205212897 and 25205212906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4170029 + ... + 4176068.

It is an arithmetic number, because the mean of its divisors is an integer number (2220062068).

Almost surely, 2^25205212940 is an apocalyptic number.

25205212940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25205212940 is an abundant number, since it is smaller than the sum of its proper divisors (28076276692).

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

25205212940 is a wasteful number, since it uses less digits than its factorization.

25205212940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8346257 (or 8346255 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 25205212940 in words is "twenty-five billion, two hundred five million, two hundred twelve thousand, nine hundred forty".