25387381000 has 32 divisors (see below), whose sum is σ = 59406473880. Its totient is φ = 10154952000.

The previous prime is 25387380983. The next prime is 25387381009. The reversal of 25387381000 is 18378352.

It can be written as a sum of positive squares in 4 ways, for example, as 16132556196 + 9254824804 = 127014^2 + 96202^2 .

It is a super-2 number, since 2×25387381000² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25387381009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12692691 + ... + 12694690.

Almost surely, 2^25387381000 is an apocalyptic number.

25387381000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25387381000 is an abundant number, since it is smaller than the sum of its proper divisors (34019092880).

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

25387381000 is a wasteful number, since it uses less digits than its factorization.

25387381000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25387402 (or 25387388 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 25387381000 in words is "twenty-five billion, three hundred eighty-seven million, three hundred eighty-one thousand".