20387507538925 has 24 divisors (see below), whose sum is σ = 26611710804000. Its totient is φ = 15451208210880.

The previous prime is 20387507538913. The next prime is 20387507538961. The reversal of 20387507538925 is 52983570578302.

It is not a de Polignac number, because 20387507538925 - 2⁹ = 20387507538413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19827126 + ... + 20830024.

It is an arithmetic number, because the mean of its divisors is an integer number (1108821283500).

Almost surely, 2^{20387507538925} is an apocalyptic number.

20387507538925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20387507538925 is a deficient number, since it is larger than the sum of its proper divisors (6224203265075).

20387507538925 is a wasteful number, since it uses less digits than its factorization.

20387507538925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045725 (or 1045720 counting only the distinct ones).

The product of its (nonzero) digits is 127008000, while the sum is 64.

The spelling of 20387507538925 in words is "twenty trillion, three hundred eighty-seven billion, five hundred seven million, five hundred thirty-eight thousand, nine hundred twenty-five".